Mine is the wings of fire series, it is a “kids” novel (think like warrior cats age range)
But Tui T sutherland is so good at writing characters and introducing and describing worlds and characters that i reread it every so often. Like, she managed to write a book from the pov of a mind reader and it works.
Every book is from a different character’s pov and each character feels wholly unique.
The main issue with the series is that the plot is kinda average at best, the characters really carry the story.
I absolutely consider Phantom Tollbooth a masterpiece. There’s nothing else like it, and it has extraordinary persistence.