The search term reveals a lot about modern learning habits:
Below is a blog post summarizing the book's value, key topics, and how to use it effectively. Mastering the Basics: A Review of Ethem Alpaydın’s Introduction to Machine Learning
While the full copyrighted textbook is typically available via The MIT Press or major retailers, several community-maintained resources exist on for students: Machine Learning, Revised and Updated Edition
However, the vast majority of PDFs found on GitHub are uploaded without the publisher’s or author’s consent. MIT Press actively files DMCA takedowns, which is why many repositories appear and disappear rapidly. Legitimate free access does exist through university library subscriptions (e.g., SpringerLink, MIT Press Direct) or open-access editions of earlier versions (though the 4th edition is not free).