Is pie in the sky a good book or not book?

"Pie in the Sky" is not a book. It's a common idiom meaning something unrealistic or impossible to achieve.

If you're interested in a book that deals with the idea of unrealistic expectations or achieving something seemingly impossible, I can recommend some titles. To do that, I need more information about what you're looking for. For example:

* What genre are you interested in? (Fiction, non-fiction, fantasy, romance, etc.)

* What themes are you interested in? (Hope, perseverance, ambition, disappointment, etc.)

* What kind of tone are you looking for? (Uplifting, humorous, thought-provoking, etc.)

Once you tell me more about what you're looking for, I can give you some specific book recommendations.