Encyclopedia Brown and the Case of Pablo's Nose

Rating for nostalgia. I loved these books as a kid, after I found old copies of my dad's at my grandparents' house. Some of the slang is hilariously dated now, but the short little mysteries hold up. It's honestly pretty impressive that decent little mysteries can fit in just a few pages, and I loved the flip-to-the-back-for-the-answer format. I learned a lot of interesting trivia from these books, and even remembered the solution to the first mystery in this particular collection.

Mostly solvable. Don't give up on the one I missed, The Case of the Smoke Signals. The clues are all there, and the only 'encyclopedic' fact needed is one that everyone over the age of 8 or so should surely know. I did, I'm embarrassed to admit.