I know you probably don’t want to expose solutions to the exercises so they can be used in a classroom, but for people like me, I don’t want to create an online discussion to every problem I attempt just to check my work.
I prefer to read textbooks that have solutions, so I can know for sure my answers are correct.
I don’t really buy the “you know when your solutions are correct”. The beginner can easily fool themself into thinking their solutions are correct, when they aren’t.
Due to that, I won’t be buying your book.