Forgot to include:
Nick of Time by Ted Bell - this is an adventure with a little time travel, with both old time pirates and WWII submarine intrigue. DD11 actually gasped out loud at a couple of exciting scenes.
Also, the Gideon Trilogy, starting with The Time Thief by Linda Buckley-Archer. And some of the old Robert Heinlein books, like Have Spacesuit, Will Travel. Some are too adult, but there are several that are quite fun.
Nick of Time by Ted Bell - this is an adventure with a little time travel, with both old time pirates and WWII submarine intrigue. DD11 actually gasped out loud at a couple of exciting scenes.
Also, the Gideon Trilogy, starting with The Time Thief by Linda Buckley-Archer. And some of the old Robert Heinlein books, like Have Spacesuit, Will Travel. Some are too adult, but there are several that are quite fun.