These are further books in the successful Sparks series which looks at history through the eyes of fictional and real-life characters. Each book takes the form of a lively and exciting narrative which contains lots of interesting information about the period. Down the Drain, set in the 1860's, is an exciting and smelly chase through the new London sewers. Stanley and Bertie go down the sewers looking for treasure. They're not scared of the rat-catching, child-eating King of the Toshers - he's just a story, or so they think...