Harry Potter and the Half-Blood Prince

This is the book in the series that I have reread the most. Not even close. Seeing Harry finally have agency instead of just resolving whichever situations he finds himself in was a nice change of pace. Plus, this book was (finally) a deeper look into the magic of this world that I felt was long overdue.

Age range: 12+
This book leans more romantic, and shows Harry wrestling with some darker emotions. May be difficult for younger readers.