History Hackers: Roman Rescue

Charlie and Tilda discover a portal back to the days of the Roman Empire and end up as slaves at a Roman Bath serving sweaty Romans! Will they be able to use their wits and puzzle solving skills to escape? With an appearance by the Emperor Severus and a possible origin of the game of rounders.

A nice shortish novel to read to children, 8 to 9 year olds seemed about right to me. Good fun and educational (though don't tell the children that ;-) )