It sounds like you're looking for the PDF of Tom Mitchell's classic textbook "Machine Learning" (1997, McGraw Hill) , specifically in relation to GitHub.
"Tom Mitchell machine learning"McGraw-Hill (the publisher) and Carnegie Mellon University (where Mitchell teaches) do not offer a legal, free, full PDF of the 1997 edition. However, authorized previews exist: tom mitchell machine learning pdf github
PDF availability and legality
Because the book is a staple in computer science education, many developers have uploaded Python implementations of its classic algorithms and chapter solutions: It sounds like you're looking for the PDF
Here's the direct and practical answer:
GitHub hosts no authorized PDF of Mitchell’s book. However, it contains several legitimate, legal repositories: Summaries, notes, and code implementations of the book's
Study Notes: The repository klutometis/mitchell-machine-learning provides structured notes and summaries in Org-mode for better scannability. Why This Book Still Matters