Stellarlune

Nine books into the Keeper of the Lost Cities series, Shannon Messenger delivers what devoted fans have been waiting for: the long-anticipated first kiss, two villains in a battle to the death, and real movement on the Stellarlune mystery. Sophie Foster remains a character readers care about, and the magical world continues to feel inventive. This is clean fantasy — violence is present but not graphic, romance is sweet and age-appropriate. The honest limits are real: at 732 pages this is only accessible if you've read all eight prior books, and the series has accumulated enough unresolved threads that even committed fans may feel the strain. Best for readers already invested in the series rather than newcomers.