You know that children’s-writing advice not to put much stock into whether your manuscript is a hit with your own kids or grandkids?

Well, here’s Rick Riordan in the November Texas Monthly:

Are your kids the audience for your books?

Oh, absolutely. I always think of my sons first. If it’s a book they’ll like, it’s probably a project I’ll go forward with. I would never think about sending a manuscript to my editor before I read it to my sons. Because if it doesn’t work for kids, I’m wasting my time. It’s one thing for a book to fly with adults, but the kid test is a much tougher litmus test.