The Phantom Tollbooth by Norton Juster

The Phantom Tollbooth by Norton Juster is the story of a bored boy named Milo who comes home to find a box. It contains a a tollbooth that allows him to drive his toy car into the Kingdom of Wisdom, with the two cities of Dictionopolis and Digitopolis. The story follows Milo’s journey through the kingdom, attempting to rescue the twin princesses, Rhyme and Reason, and is filled with word humour and unlikely characters like King Azaz the Unabridged, a not-so-wicked Which, a hypocritical beetle called the Humbug and a watchdog named Tock. I only discovered it as an adult but it would be great for anyone above mid-primary age.