The two-day offer this Saturday and Sunday is intended to give viewers a taste of what’s behind the Apple paywall.

We learn how Lippincott found a single thread in historic institution and made a hyphen into a bridge for opposing views.

Jon Klassen, a Caldecott medalist, is the author-illustrator of the picture books “I Want My Hat Back,” “This Is Not My Hat” and “We Found a Hat.” His first original solo board books — “Your Island,” ...