Check out this article on everything you need to know about how to annotate books for fun, including how to's and essential supplies.
How I Annotate My Books – Simone and Her Books
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How to Annotate Books for Fun - Plus my Favorite Book Annotation Supplies - Bookish Coffee Blog
How to Annotate Books for Fun - Plus my Favorite Book Annotation Supplies - Bookish Coffee Blog
How to Annotate Books When You're Reading For Fun - the wordy habitat
Why do people annotate library books? : r/Libraries
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How To Annotate Books For Fun – Plus My Favorite Book Annotation Supplies