Loyalty is tested in this second book in the thrilling time travel adventure trilogy from New York Times bestselling Spy School author Stuart Gibbs.

This middle grade novel is an excellent choice for tween readers in grades 5 to 7, including for summer reading and during homeschooling. It's a fun way to keep your child entertained and engaged while not in the classroom.

Having assumed the identity of a young D'Artagnan, Greg Rich is beginning to get the hang of things in 1615 Paris. But he hasn't figured out how to get home yet. Or how to defeat the dangerous Michel Dinicoeur, who has made it his mission to destroy Greg, Athos, Aramis, and Porthos.

When Dinicoeur escapes the Bastille and flees to Spain, the Musketeers charge after him, only to be ambushed. Someone is anticipating their every move. Could there be a traitor in their midst? If the Musketeers can't trust each other, who can they trust? It's "all for one and one for all" . . . isn't it?

And don't miss the action-packed finale, The Last Musketeer #3: Double Cross.