Check out this article on everything you need to know about how to annotate books for fun, including how to's and essential supplies.
the things we never got over Book annotation, Book annotation tips, Book aesthetic
How To Annotate Books For Fun – Plus My Favorite Book Annotation Supplies
Repurposed Gifts of Love – The Shield
How to Annotate Books for Fun - Plus my Favorite Book Annotation Supplies - Bookish Coffee Blog
How To Annotate A Book: 5 Ways To Get It Done Effectively
Repurposed Gifts of Love – The Shield
Annotating Books – Struggling Bookaholic
Annotate Your Books: Creating A More Thoughtful Reading Experience
Why do people annotate library books? : r/Libraries