Even if your little sprouts seem to set up a grudge match over just about everything: choosing the Friday night movie, toppled LEGO towers, and endless hours of she-touched-me-again, in the end, a brother or sister is a built-in best friend. (Who better to help drive Mom crazy or snicker with at Dad’s creative cooking?). Flip through the album to see our picks for best picture and chapter books celebrating the ultimate family bond.

The Boxcar Children

Age: 5-9

Surviving sans parents is always a popular theme—and turning an abandoned train car into a home? Even more thrilling! Like Nancy Drew and other vintage series, this one—about four orphaned siblings who have to make it on their own—has been rewritten and repackaged for the twenty-first century, but for ultimate charm, we recommend seeking out the 1942 original.

Available at albertwhitmanco.com, $5.99.

What’s your favorite book about siblings? Share with us in a comment below!

— Emma Bland Smith