I really liked this one. The premise was super intriguing and I loved the whole book from the first page. The concept of being able to see how your life turns out based on the choices you make is interesting, but I was more captivated by the focus on how your personality morphs based on your experiences. At the end with all the Jasons, even though they were all the same person in theory, they were all fundamentally different.
I'll admit I'm still struggling with wrapping my head around all of the versions of Jason at the end. If each time Jason 1 opened a door and then returned to the corridor, he created another version of himself that branched off and continued a separate journey--what happens, then, each time that NEW version starts entering new worlds and then returning to the corridor? The same thing? Because if that's the case, I'm fairly certain the population of Chicago is going to double just from all these extra versions of Jason.
Also, I agree with whoever said it didn't make much sense that all these other Jasons found home before the original Jason did.
I didn't mind the way it ended, although I will admit that I'm the pessimist who closed the book with the feeling they ended up somewhere terrible.
I totally laughed out loud at tank's suspicion, though.