I bought a copy of this book while I was picking up my car at DMCMW. This is a little gem of a book. $30 is a bit much to swallow for about 110 pages - BUT - the knowledge in the book is well worth it. Most of it is stuff we already know, but there were definitely some lil zingers and "I didn't know that !!" moments.
Overall, worth the money if you want to really go into some unique details about the cars and get caught up on some DeLorean lore. I don't regret buying it!