While you can find scanned copies on academic sharing sites (like Library Genesis or Academia.edu), these often have poor OCR quality, missing pages, or distorted mathematical symbols. Furthermore, distributing the full PDF violates copyright, even for a low-cost Dover book.

"Introductory Discrete Mathematics" by V. Balakrishnan is an excellent textbook for undergraduate students in computer science, mathematics, and engineering. The book provides a comprehensive introduction to discrete mathematics, covering a wide range of topics in a clear and concise manner. While it may not cover more advanced topics or offer extensive online resources, it remains a valuable resource for students looking to build a solid foundation in discrete mathematics.

Covers set theory, logic, and the principle of mathematical induction. Combinatorics (Chapters 1–3):

The text is structured to provide a foundation in combinatorial mathematics and logical structures. Key sections include: Fundamentals

One popular textbook on introductory discrete mathematics is "Introductory Discrete Mathematics" by V. K. Balakrishnan. This book provides a clear and concise introduction to the subject, covering topics such as:

The textbook Introductory Discrete Mathematics V. K. Balakrishnan