I think this list could use some updating. Most books on the list are super old. Also, from cursory look, there appears to be only one book on discrete math in Intermediate. There are tons of discrete math books that should serve as stepping stones for the one listed. For example, Discrete Intro to Math by Edward Scheinerman and Discrete Math by Susanna Epp.
It's actually on Github[1] now, updates would probably be welcomed.