Sherlock Bones and Dr. Catson are entangled in an arithmetic adventure. They must follow a teasing trail of addition and subtraction-themed maths puzzles, and it's up to the reader to solve each sum, all in the hope of foiling Professor Moriratty's evil plan.
This charming maths activity book features 'Sherlock's Secret Solver' magnifying glass which reveals the answer to each puzzle when placed over a moiré area, allowing children to test their numeracy skills again and again.
| ISBN: | 9781780555508 |
| Publication date: | 12th July 2018 |
| Author: | Jonny Marx, Kirstin Swanson |
| Illustrator: | John Bigwood, David Shephard |
| Publisher: | Buster Books an imprint of Michael O'Mara |
| Format: | Paperback |
| Pagination: | 32 pages |
| Genres: |
Children’s / Teenage general interest: Mathematics and numbers Children’s interactive and activity books and kits |