In this Sunday’s issue of PARADE, Castle’s Nathan Fillion, 41, reveals his favorite reads and confeses why he’s hooked on books in PARADE’s summer reading issue.

In the extras below, the actor opens up about his summer plans, bringing Firefly back, and the power of Twitter.

“Grammar was a big deal. We could not use a double negative or end our sentences with prepositions. We couldn’t split infinitives. And we weren’t allowed to say ‘eh’ — you know, Canadians are fond of that stereotype of saying ‘eh’ at the end of their sentences. Now I catch my parents saying it!” [Read the rest here]