Excerpts from some five start Amazon Reviews: 

"Head Case is an enjoyable gem of a mystery, and more. Our narrator, Olivia Zack, starts the book dead and things go backwards from there. Olivia takes us hopping and skipping through time as she gradually unravels how she came to be no longer eligible for the census. She relives all the mistakes she made along the way in true neurotic New York girl fashion and brings us along for the ride. There are drug-dealing grannies, pill-popping celebrities, Russian mob bosses, eccentric ex-Soviet chemists, feuding roommates, faltering friendships, bad bosses and a rat named Raskolnikov – so how can you not have fun?"

"This book had a little bit of everything. First and foremost, the protagonist was fleshed out, entertaining, a bit snarky, and damn funny. The plot was not only possible, but in today's world, totally plausible. Anyone who takes antidepressants, or other mood altering drugs may want to check this out. Although their is plenty of humor, there is also a lot of truth, and overall this was just a great read! Looking forward to more from this author!"

"One one more thing......without repeating any of the reviews above, let me add to them. I started off with this book having a preconceived idea about what it was going to be about. Let me tell you that from three pages in I had already done a mental double-take multiple times. That is when you just say, ""Whaaaat...? And it was an idea that I have never read before. The closest storyline would be Memento and that was a crazy, wild and fun story. THIS...oh my. Oh oh oh my. All I can say is that if you don't put ALL YOUR OTHER BOOKS AWAY and read just the FIRST chapter you are NUTS; you will find yourself going and going and I will just say it now --your welcome!"

"This is the most fun I have had reading in a long time. It is a FUN and unique read. Its a strange book in that its such a light read but with dark undertones that make it delicious. I loved this. Highly recommend."