Raymond Murphy's English Grammar in Use (Intermediate) , particularly the latest Fifth Edition
The search for a "new" PDF version usually points to the Fourth Edition (published by Cambridge University Press), which superseded the previous editions with subtle but important updates.
Final recommendation: Buy the “English Grammar in Use Book with Answers and Interactive eBook” (5th Edition) – the latest version as of 2026. It includes both the printed book and digital access. That single investment will remain useful for years of your English learning.
The book is designed for flexible use, either as a reference or a systematic course. English Grammar in Use - Fifth Edition
Owning the file is only step one. Here is a proven study protocol:
The book consists of 145 units, each focusing on a specific grammar point.