Have you ever wondered where the other sock goes, or those keys or your earring or pen? Grandad wonders that all the time.

Things keep disappearing down the back of Grandad's sofa -- who, or what, has taken them?

When Lenny and Grandad discover the Kleptoes and their hideout, things turn nasty. And Kleptoes can be very nasty indeed ... especially Old Mother Kleptoe.

This book is part of a book series called Mad Grandad .

There are 64 pages in this book. This book was published 2018 by O'Brien Press Ltd .

Oisin McGann has worked extensively in creative media, first as freelance designer and illustrator in the publishing and design industry, and later as a background designer on the animated series 'Zorro'. During a spell at an advertising agency, he expanded into copywriting.