"Are you happy with life?" Very few people can give a spontaneous answer to this question and even fewer can answer in the affirmative. 
 Jason is taken from a life of domestic bliss and wakes up in a life that is the epitome of professional success. His invention is amazing. (view spoiler)[ scientifically I do not know if this makes a lot of sense but it was explained quite well here. The ability to experience the road not taken. I loved it. (hide spoiler)] 
 The story then follows his struggle to get back home (view spoiler)[ and once he does how he wins his family back. The multiple Jason's finding their way back was terrifying. (hide spoiler)] 
 The only drawback I felt was that not once did he want to stay back and see his life and all that he has achieved, it didn't seem like the logical human emotion, there was no doubt even for a second. 
 So then this is definitely 4.5 stars. Thank you Poonam for recommending this book