I posted a book review over at ChurchCrunch. Here is the start of the review:
Twitter is ubiquitous. Now it is even a format for books ideas. It seems odd, but as far as I can tell (in my very brief amount of searching) this is the first book made up mostly of a curated twitter stream.
I have read blog books, and journal books and letter based books, so the idea is not completely unique. And I do not think it is likely to become widely used format. 140 characters is short, perfect for twitter, a bit too short for a book.