Message of Love, the sequel to Every Time I Think of You.
In the interest of variety, I'll link as many books as I can to Alibris, which features all my books, and is a nice alternative to Amazon.com. Just don't buy the overpriced listed editions. I got most of these books used online, and had fun finding them.
Out & About
For scenery and setting, I enjoyed perusing several travel and nature books.
The Peterson Field Guides for Wildflowers (Roger Tory Peterson, Margaret McKenny, editors) and Eastern Trees (George A. Petrides, Janet Wehr, editors) gave me accurate information about the flora of the area. Living in California makes for a little distance from knowing which kinds of trees and plants Reid would work with in his classes, his job, and elsewhere. They're also the sort of books Reid would use a lot.