Congratulations to the winners! Jose Gordillo in Guatemala, Diana Spiric in Croatia, Celia West, Siobhan Mallon and Emma Hastie in the UK. They each win a copy of Variations on Normal.
The 128-page hardback contains a series of his "odd yet perfectly logical" drawings of inventions – demonstrated in a new set of animated gifs – and is a follow-up to an earlier paperback version.
Wilcox's surreal creations include the The Portable Bottom Seat, Wrist Nets for the Butterfingered and the Sick Bag Beard.
Other amusing and obscure concepts appearing in the book range from a slide for falling leaves to a poncho for an entire family.
"Dominic Wilcox's drawings aren't just witty and beautifully drawn, they are serious challenges to the real world to keep looking at itself with innocent eyes, wondering what else is possible," said designer Thomas Heatherwick.
Wilcox recently announced plans to transform his idea for a stained glass car into a reality, as part of an exhibition curated by Dezeen and MINI Frontiers this September.
Variations On Normal is published by Square Peg and available to purchase on the designer's website. Winners will each receive a copy signed by Wilcox.
This competition is now closed. Five winners will be selected at random and notified by email. Winners' names will be published in a future edition of our Dezeen Mail newsletter and at the top of this page. Dezeen competitions are international and entries are accepted from readers in any country.