My husband is reading "The Expectant Father". I am not sure of the author, but we found it at our bookstore in the pregnancy section. He is really enjoying it. It is nice too, because it goes into how he may be feeling and what he can do and not always just about me and the baby. He has really enjoyed it.
I found an excellent one that I bought for my DH. It's called "Your Pregnancy for the father-to-be" Its written by Dr. Glade B. Curtis and Judith Schuler, M.S.
Its really really good. It talks about everything thats happening, in terms of how he can support you, but also how it may be making him feel, etc. It also goes through the pregnancy trimester by trimester, explaining the changes etc. DH liked how it very specifically addressed the expectant fathers concerns as well. This is also our first child, and this book has been really good for him.
I hope he enjoys. Take care.