While the full book is protected by copyright, you can access the text through several platforms:

When choosing PDFs look for problem books by authors known for combinatorics/graph theory and algorithm textbooks that include exercises—especially those that explicitly say "problems" or "problem-solving approach."

When students or educators search for the "best" PDF or resource on this topic, they are usually looking for a text that bridges the gap between intuitive understanding and rigorous mathematical formalism. Marcus’s book achieves this through three distinct features:

: It includes roughly 360 problems within the chapters and an additional 280 homework problems to reinforce learning.