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From boots for dogs to knife-proof armour; ideas of a real-life inventor

Digital

10 pledges

Ebook edition and your name in the back of the book.

Hardback

14 pledges

A first edition of the hardback plus the ebook and your name in the back of the book.

Collectable

7 pledges

A signed first edition of the hardback plus the ebook and your name in the back of the book.

Tote bag

3 pledges

An exclusive tote bag featuring an image of the underwater bike, as well as a signed first edition of the hardback plus the ebook and your name in the back of the book.

Fine art print

1 pledge

A 12” x 8” print of one of the images from the book, signed first edition of the hardback plus the ebook and your name in the back of the book.

Spectangle

2 pledges

Never lose your glasses again with one of Douglas’s smallest but most well-sold inventions. Signed first edition hardback, ebook and name in the back of the book as well as an original Spectangle and presentation postcards about Spectangle, including sketches. (Limited to 8)

Tea and sketchbooks

Satisfy your curiosity, look through Douglas’s sketchbooks yourself. Tea and cake with the author and the chance to look through a box of notebooks and talk about the inventions. Up to six people. Location to be agreed, but preferably within two hours of Bristol (including London). Also included, a signed first edition of the hardback, ebook and your name in the back of the book (one per person).

Visit the shed!

Tea and cake with the author (and probably her mum), the chance to look through the notebooks and handle the inventions. You’ll have to make your own way to Shropshire. Up to six people at a time. Includes a signed first edition hardback, the ebook, and your name in the back of the book per person.

Golf Patron

Own one of the last original Buchanan Design golf putters, plus presentation pack, including reviews of the putter and sketches. Includes a signed first edition hardback, ebook and your name in the back of the book. (One available)

Name Patron

Your name in the front of every copy of the book, plus a personally dedicated first edition of the hardback, ebook and your name in the back of the book.