I ran out of space for books in my house, so I decided to put the most pertinent Outdoor Books in my car for road trips. My favorite is the geologic guide to utahs highways, always a killer way to pass time when the miles start going by slower.
or a book store.. i could spend hours picking up books based on covers i like, reading the back, and then adding it to my want to read list
also i love wandering around an antique mall if you google ones that are driving distance.. i love looking at vintage art and glassware and furniture