Barry Cole 
The Time Bandit [EPUB ebook] 

The Time Bandit follows the adventures of two eleven year old children and their local Bobbie, who thanks to the discovery of a one-arm-bandit in the local scrap yard, are able to travel back in time. How the machine got there nobody knows but as the trio were soon to find out, there was no doubting its power as they were transported back to times and places buried deep in the past, each of them with its own mystery.