Mr. Toad and LarryHN:
I was snowed in all weekend so I followed your suggestions. I backed up all my photos, and then ran Rebuild Database. The application did a lot of work, but I still couldn't get into my old book. I ended up running all four of the repairs, which took several hours, and this did correct the missing photos in Faces (about half were missing, but I didn't think to mention this as part of the problem because I didn't know there might be a connection). Anyway, that's a worthwhile side benefit of running these repairs. But my book still doesn't open.
Enough, though. I can live with not being able to print another copy of the book. Just keep this in mind in case you hear of future issues like this one. I'm not that technical, but I will walk away thinking that there's some minor corruption in the database that doesn't interfere with 99% of iPhoto operations. I shouldn't take up more of your time. Thank you for your attention and time.