Shamanism for English kids

A clever thing about writing children's literature is that many things can slip by - kids are easy about switching genres, and not ashamed to let their imaginations go rampant.
I've just read a great book for the longest day of the year (a climactic scene takes place on December 21st), David Almond's Kit's Wilderness. It's a shamanic tale slotted into a northern English town, complete with journeys to reclaim the dead and underground ceremonies. Marketing managers for adults would run startled from it. More fool them. It's a spellbinding read.