I’ve been following the 'Keeper of the Lost Cities' series since the first book dropped, and it’s been a wild ride. As of now, there are nine main books in the series, with the latest being 'Stellarlune'. Shannon Messenger has done an incredible job expanding the world of Sophie and her friends, and each book just adds more depth to the story. The series has a way of keeping you hooked with its mix of adventure, friendship, and mystery. I remember binge-reading them all in a week because I just couldn’t put them down. The fandom is always buzzing about what’s next, especially with the way 'Stellarlune' ended. If you’re just starting, you’ve got a lot to look forward to—nine books full of twists, turns, and emotional moments that’ll leave you begging for more.