One of the books I turned to in resuming running was my tattered copy of Jeff Galloway's Book on Running. Galloway has been a significant influence on my running - I've always liked his emphasis on proper rest, as opposed to pounding the roads every day of the week. As I was starting over from scratch, I felt this formula would work for me. There are many running books out there, but a lot of them either do not cover, or gloss over, an important part - the beginning.
I also acquired a copy of Galloway's Half-Marathon: You Can Do It. I was going to need to rely on walk breaks as I built up my endurance, and this book is a good source for planning. One of my goals I set for myself was to run a half-marathon in 2008. As I increased my running in the fall of '07 (slowly, gradually), I came across Dean Karnazes' Ultra-Marathon Man. That was very inspiring reading for me, but more on that another time.
If you have any suggestions for practical or inspirational running reading, let me know.