This is a book that I frequently recommend to the parents who sign up for my parenting workshops. It's fun to read and nicely illustrated.
The book has a few minor holes (you won't find any information on preconception health, fertility, infertility, conception, or planning your next pregnancy, since the book only focuses on the nine months of pregnancy plus the month after you give birth), but it's a good read nonetheless. (I've yet to find a disappointing book by Dr. Sears, frankly.)
Parents who intend to breastfeed might want to supplement this book with The Complete Book of Breastfeeding by Sally Olds and Marvin Eiger, since their isn't as much information on breastfeeding as what you might expect. (The coverage is pretty decent--definitely miles above what you'll find in What To Expect, for example!--but still is a bit too sketchy for my liking.)
Parents-to-be who want real nitty-gritty information on what you can do to increase your odds of conceiving quickly, what drugs are and aren't safe to take during pregnancy, what pregnancy aches and pains are normal and what ones aren't, the pros and cons of prenatal testing, and other important issues might want to also pick up a copy of The Unofficial Guide to Having A Baby by John Sussman and Ann Douglas--a highly comprehensive reference guide to pregnancy.
Parents who'd like to follow their baby's development day by day and have a fun place to record their baby's milestones should pick up a copy of The Pregnancy Journal by Christine Harris--a gift that I frequently give to friends of my own.
I guess I'd better stop recommending books before you run out of money. Heaven knows I spend enough of my own on books!