I don't think there exist any book qualified as "textbook" except this one. Discrete Math by Oscar Levin. https://discrete.openmathbooks.org/dmoi3/ https://dis

I don't think there exist any book qualified as "textbook" except this one. Discrete Math by Oscar Levin. https://discrete.openmathbooks.org/dmoi3/ https://discrete.openmathbooks.org/dmoi3/ No left as exercise bullshit, no prove yourself bullshit, etc. Everything is explained thoughtfully and multiple times in the book, to ensure the readers really get the idea of the subject.