There are! Some books have “solution manuals” or “companions” with worked solutions to a subset of the problems. There are also those big compendia of “5000 pro

There are! Some books have “solution manuals” or “companions” with worked solutions to a subset of the problems. There are also those big compendia of “5000 problems in linear algebra” or whatever. It’s true that these are most common for big, intro-to-intermediate classes, and less common elsewhere, but there are a lot kicking around....