Fresh, inventive, and surprisingly sweet. This was a genuinely fun read.

Other reviewers mentioned that there's an awful lot of science in this book, and I didn't really take them seriously... but there's a TON of science. This is obviously what the book is going for--a riff on the major breakthroughs of the last 50/100 years in physics, seen through the eyes of a 10-year-old prodigy having the WEIRDEST day. It's a great idea, and some of it is executed very well. Edge does a great job boiling down some of the more complex and theoretical concepts to a paragraph and using MG-appropriate language. In my opinion, however, there are just too many different concepts crammed into this one book. The story would have been much stronger if he had picked two or three of these ideas (say, relativity, infinity/Mobius strip, and black holes) and given them more room to breathe. The book jumped to a new major idea every couple of pages, and if I weren't already familiar with these terms, I wouldn't have had the stamina to follow them.

This book will likely be appealing to a young reader who is on the verge of jumping right into adult sci-fi but would just as soon read something with a more relatable character. I worry, however, that many will be turned off by the protagonist (why is she a next-level prodigy? wouldn't the story work just fine if she were a garden-variety genius?) and the sheer volume of mini science lessons.

I also want to mention that the story has a dark edge that I wasn't expecting. There's some emotional weight to the last quarter of the book that will probably fall on readers who aren't ready for it (in fun twisty ways and in jarring, horrifying ways).

Weird but not in a good way in a confusing way. The story feels underdeveloped and abrupt. I really wanted to like it but it just made no sense. Perhaps if the author expanded all of it, it could have been amazing. I'm not sure.