Oxford Practice Grammar Advanced.pdf File

While I can't show you the PDF, here is the type of high-level grammar this book covers that most apps ignore:

If you manage to get your hands on a legal copy (digital or print), here is how to use it for maximum retention. OXFORD PRACTICE GRAMMAR ADVANCED.pdf

by George Yule is one of the best resources for students aiming for C1/C2 proficiency. What’s inside? Deep Dives: While I can't show you the PDF, here

Since I cannot provide the PDF, here are the ways to get it. or smartphone during commutes.

Study on your tablet, laptop, or smartphone during commutes.