This collection of interviews of Brian De Palma, the celebrated filmmaker, reads as an insightful window into the world of filmmaking--not only in the 1970's and 80's, but up till the 2000's where many view his film career to have reached a lull (some consider it to have occurred before this date). However, that is not a detriment with this collection, in fact I found that the book was great, going from interview to interview, each conducted as a new film was coming out (i.e., one for Sisters, one for Phantom of the Paradise, one for Carrie..so on and so forth).
While this book may seem dated since it's last interview was around the time Mission to Mars debuted, it really isn't. Look at Truffaut's interviews with Hitchcock, as relevant as ever. However, if you are looking for a newer interview with the great De Palma, you can purchase the Criterion's DVD or BluRay copy of De Palma's masterpiece, Blow Out, which includes an hour long interview conducted by Noah Baumbach recorded in 2010 or 2011, which serves as nice companion piece to this collection.
I enjoyed reading this, and if you love the films of De Palma...or even if you don't, it will give you perhaps a better understanding of who the man is and the way he thinks. I recommend this book. Highly.