You can try searching for the textbook "Discrete Mathematics" by Norman L. Biggs on various online platforms. Here are a few options:
Algebraic Methods: Introduces groups, rings, fields, error-correcting codes, and symmetry. Key Educational Features Discrete Mathematics - Norman L. Biggs norman l. biggs discrete mathematics pdf
Lack of Practice Material: Some students have noted that the book provides relatively few practice problems per section (often only 2 to 4 exercises). You can try searching for the textbook "Discrete
Amazon: Check if the book is available on Amazon (www.amazon.com) in digital format. You might find a Kindle version or a PDF download link. Key Educational Features Discrete Mathematics - Norman L
Norman L. Biggs’ Discrete Mathematics is a fantastic resource for any computer science student. The depth of his explanation on graphs and combinatorics is worth the effort of acquiring the book.
Do Not Skip the Proofs: It is tempting to just look at the formulas. Force yourself to follow the logic of every proof Biggs presents.