A terrific times-tables activity book with an excellent ‘reveal’ feature that uses a moiré device to unveil each answer. Sherlock Bones and his trusted accomplice Dr. Catson are embroiled in a frenetic times-table adventure. They must follow a teasing trail of multiplication-themed puzzles, and it’s up to the reader to find the answer to each fiendish problem, all in the hope of foiling Professor Moriratty’s evil plan.
This charming activity book features Sherlock’s ‘magic device’, which reveals the answer to each puzzle when placed over a moiré area, allowing children to test their numeracy skills again and again.
Jonny Marx lives in London, where he works as a children's book editor and author.
From a compendium of mythical monsters and a chronology of prehistoric creatures, to books about crime capers, lost unicorns, incredible human beings and humankind, Jonny has worked on more than 60 titles (and counting!).