Is Neil Gaiman a children's author? I've only read "American Gods", but I wouldn't class that is a kids book. I'd be thinking more along the lines of Phillip Pullman, or Brian Jaques (if he was still alive).
Or maybe the guy who wrote the magic key books. With the Tardis instead of the key taking floppy and Biff off to magical worlds and adventures.
"The universe has to move forward. Pain and loss, they define us as much as happiness or love. Whether it's a world, or a relationship...everything has its time. And everything ends."-Elizabeth Sladen: RIP.