In the kid’s book “Prince & Knight,” the handsome prince falls in love not with a princess, but with the knight. Some parents want to opt out of that story.

Chicka Chika I Love Mom and Chicka Chicka I Love Dad (Simon & Schuster, 40 pages each, hardcover, $13 each) are alphabet books based on the 1989 classic, Chicka Chicka Boom Boom by American writers ...