Discrete Mathematics hasn't changed drastically in the last two decades. A second-hand copy of an older edition (like the 2002 reprint) is often perfectly usable for self-study. Check:
: The text provides a rigorous yet accessible introduction to: norman l. biggs discrete mathematics pdf
The structure of Biggs’s book aligns closely with the “core topics” identified by the American Mathematical Society’s Mathematics for Computer Science (MCS) syllabus. Many universities have modeled their first‑year discrete mathematics courses directly on Biggs’s chapter order, thereby standardising the learning trajectory for thousands of students worldwide. Discrete Mathematics hasn't changed drastically in the last
Discrete Mathematics by Norman L. Biggs is widely regarded as a foundational textbook that bridges the gap between elementary and advanced mathematics norman l. biggs discrete mathematics pdf