Lenny Spink is the sister of a giant. Her little brother Davey won't stop growing - and at seven is as tall as a man.

When they receive their monthly instalment of 'Burrell's Build-It-at-Home Encyclopedia' set, fun and excitement burst into Lenny and Davey's lives.

The amazing, mysterious entries in the book's pages give them a way to dream of escape: Lenny vows to become a beetle expert, while Davey decides he will run away to Canada and build a log cabin.

But as Davey's disease progresses, the siblings' richly imagined world becomes harder to cling to in this deeply moving and original novel about grief, family, and wonder.