Beginners’ astronomy books

Bob and Ann are friends with reptiles and a telescope. I wrote Bob with advice on getting started. While he’s dubious about the entry-level refractor in question — he says that they’re frustrating to use — he recommends as a starter Exploring the Night Sky by Terence Dickinson. Now that’s a young-adult title, so I spelunked a bit on Amazon to find a couple of other beginner titles that may be more suitable, also by Dickinson: The Backyard Astronomer’s Guide and Nightwatch: A Practical Guide to Viewing the Universe. Will investigate. More suggestions welcome.