A stunning and thought-provoking read! A.D. Sui has a masterful way of weaving emotion with a compelling narrative that stayed with me long after the final page. I couldn't put it down—truly an unforgettable story. Highly recommended!

This sapphic cli-fi thriller is ambitious, emotionally charged, and quietly devastating in the way it blends love, grief, and climate anxiety into one layered narrative. It’s as much about what could have been as it is about what still might be, balancing speculative science with deeply personal stakes.

The multiverse element adds a haunting emotional dimension, allowing the story to explore alternate lives, missed chances, and lingering love. Watching different possibilities unfold creates a bittersweet tension that runs alongside the central mystery, giving the narrative both urgency and melancholy. The relationship at the heart of the story feels fractured yet magnetic, shaping every choice and every timeline.

The near-future setting is bleak but thoughtfully constructed, with climate collapse forming a constant backdrop. The scientific concepts—particularly the search for solutions across timelines—add intrigue while reinforcing the themes of hope, desperation, and humanity’s tendency to look elsewhere instead of fixing what’s in front of it.

There’s also a strong undercurrent of obsession and grief that drives the pacing forward. As the stakes escalate, the story becomes both a chase for truth and a struggle to remain grounded in reality. That tension between escape and acceptance gives the narrative emotional weight.

Inventive, atmospheric, and poignant, this is a compelling blend of speculative fiction and romance that explores love across possibilities while holding onto a fragile thread of hope.

Immediately hooked me. Really engaging story with an important message. The setting was very interesting and loved the recognizable places as a Canadian. Don’t want to say to much as it’s a beautiful ride and I recommend going in as blind as possible.

thank you to NetGalley for an ARC of this book in exchange for a review.

"our infinite and inevitable ends" is a brain melting spiral into the consequences of perfectionism and compounding guilt. following the fall out of yana's death and the explosion of the TempCog building, cas chases a never ending thread of infinite realities to solve yana's death, clear her name, and save earth—if she can. stuck between visions of a life she's never lived, a cop desperate to close the case, and yana's maybe-ex-lover, cas struggles to reconcile what all she's left behind for good.

this book does many things well and above all else, the grace with which it depicts the often messy reality of loving another person and living on a dying planet is exceptional. lost somewhere between hope for the future and grief for the past, "our infinite and inevitable ends" asks the reader to take a leap of faith. the bone-deep sorrow the characters feel and express was so candid that i found it impossible to not be sucked in to their descent. the surrealist imagery of overlapping timelines, drug addled crash outs, and whispers from the past all coalesce into a downward spiral that cas goes on head first. it was an absolute delight to read and was addictive from the start with one of the most solid opening chapters i've ever read. thank you so much to NetGalley and A. D. Sui.

A well paced novel with a great arc. Sapphic longing pitted against a background of extreme climate change and desolation. An ambitious plot with well written multifaceted characters. Would recommend for anyone looking for a captivating read with teeth.

Sui is now on my autobuy list after this, The Iron Garden Sutra, and the Dragonfly Gambit. Just go and preorder this now. The two things you need to know about this book going in: 1. There is a drug that allows you to see into alternate universes. 2. Dr. Cassandra Barlowe is working on a plastic eating fungi on the Great Garbage Patch, and Dr. Yana Guslvig is the leading researcher on the aforementioned drug, and they used to be with each other. The story kicks off with Cassandra finding out Yana has died in a suspicious matter, and the novella is her journey using the drug to try and find out what actually happened, while also tormenting herself with other visions of herself and Yana in other timelines, with government agents thrown in as a fun side quest to deal with throughout this. Throw in the fun existential question of "should we invest money in actual practical proposals vs looking to other realities for what their solutions were or weren't", and deciding how to live your life after a major grief inflection point, and you have a hell of a novella. Highly recommended.

A heart wrenching tale of love and loss in a dystopian setting. One of the most unique parallel reality stories I've read. Plus it takes place in Toronto!

What a devastatingly beautiful book. In light of the state of our lives, there has been a recent surge in books about the end of the world (especially due to irreversible climate damage), but this one really floored me. There are elements of suspense and intrigue, but ultimately, this is a book about humanity: what we owe to each other, what we owe to ourselves, and what it means to exist in a dying world. The prose was beautiful and the characters were raw, real, at times frustrating, but in ways that I completely understood because they were so human. The ability to tackle philosophical questions about existence as well as the difficulties of everyday life, and the wish to peer into alternate versions of ourselves and our loved ones, really made this book stand out. Depressing and hopeful in equal measure, I will be thinking about Our Infinite and Inevitable Ends for quite a long time

What a blockbuster of a novel. Love , obsession and grief are the main themes concerning the three women at the centre of things in the near future when climate change has become serious. Novels dealing with time travel or alternative realities as here often become so complex that it feels impossible to keep track of events , but here it is reasonably understandable as the world looks for solutions to the climate crisis. Yana and Cass are the two scientists dealing with drug enabled alternative realities who have a volatile relationship and eventually part. Yana dies and Cass returns to try and find out what had happened. Cass becomes involved with Sandra , another brilliant scientist and I loved reading about their complex relationships as we find that all three are more connected than first appeared. Lots of introspection but it never is boring as we find out more and more about what makes them tick. Towards the end of the book as Cass’s brain becomes more damaged the narrative becomes almost dreamlike and the reader feels themself becoming part of this confused state. I was absolutely hooked on this book and it kept me thinking long after I had finished.
Thanks to NetGalley and ECW Press for the ARC

This book is haunting in the best possible way — a deeply emotional blend of climate fiction, speculative science, murder mystery, and tragic romance. Beneath its fascinating multiverse concept lies a painfully human story about grief, regret, addiction, and the desperate temptation to live anywhere but the present.

Cas is such a compelling protagonist because she feels exhausted by the world long before the mystery truly begins. The image of her researching plastic-eating fungi on a floating island of garbage is bleak and strangely beautiful, perfectly capturing the novel’s atmosphere: humanity standing knee-deep in catastrophe while still searching for impossible miracles. The concept of deleria is equally brilliant and terrifying. What starts as a scientific breakthrough quickly becomes something emotionally addictive — a way to endlessly revisit lost love, alternate futures, and better versions of yourself.

The relationship between Cas and Yana gives the story its emotional weight. Watching Cas slip through timelines where they are happier, softer, still together is heartbreaking because every glimpse makes her own reality harder to bear. The novel handles love and grief with incredible tenderness while never losing sight of the larger questions it asks about escapism, responsibility, and whether humanity’s obsession with finding perfect solutions prevents us from confronting the damage already done.

The pacing becomes increasingly tense and disorienting, mirroring Cas’s unraveling mental state, and the worldbuilding feels chillingly plausible. Government corruption, collapsing ecosystems, scientific desperation — it all feels uncomfortably close to reality.

Dark, intelligent, and emotionally devastating, this is speculative fiction that lingers long after the final page. It’s not just about alternate timelines — it’s about the dangerous beauty of wanting another life more than you want to save your own.

The publisher provided ARC via Netgalley in exchange for an honest review.

Thank you to NetGalley and ECW Press for this arc.

WOW.

A sapphic, acid rain soaked, cli-fi thriller of a devastated earth with a brain melting drug that lets you glimpse other possible realities, “Our Infinite and Inevitable Ends” feels like Bladerunner 2049 meets Blake Crouch meets This Is How You Lose the Time War. And it knocked my socks off!

Far away from her ex-lover, Dr Cassandra Barlowe is on a floating island of trash in the ocean researching plastic eating fungi to help better an Earth completely devastated by climate change. Research that is ridiculously underfunded due to the existence of a drug that gives the user glimpses into other possible realities.
But after leaving Cassandra a cryptic voicemail, her ex is killed in a mysterious explosion - taking vital research into reversing climate change with her. Cas has to turn to the reality bending drug to piece together the mystery of what happened.

Tumultuous relationships and beautiful writing come together in a novel I just couldn’t put down! Set in a future where climate change is past the point of return, this novel is heartbreaking and all too close to home in its messaging.
Breakneck pacing, unravelling mysteries and complicated love triangles had me up until 2am devouring this book as fast as I could - after this I will read absolutely anything and everything A.D.Sui writes now!