If DS can handle heroines, I suggest "Wolves of Willoughby Chase" series by Joan Aiken. The second and third are "Black Hearts at Battersea" (with male hero) and "Nightbirds on Nantucket".
The books are set in an imaginary time when Bonnie Prince Charlie sits on the throne of England, but the Hanoverian pretender Prince George plots his return. As English history buffs know, this is the exact opposite of what really happened.
DD8, the tomboy, is reading "Little Men" by LMA, as I told her it was full of fun stuff like boys burning down their school and fighting.
