Easter has arrived, and the Peanuts gang is ready to celebrate! Linus is convinced the Easter Beagle will make his annual visit and deliver Easter eggs to every girl and boy. But just in case, Peppermint Patty and Marcie are coloring their own eggs.

"Benny's friend accompanies the Aldens to the South Seas for a vacation on a supposedly deserted island where they find an unusual mystery." --

Meg and her classmates visit a medieval castle and become eyewitnesses to the theft of a priceless silver chalice. The reader is asked to solve the mystery before Meg, using clues found in the text and illustrations.

When the Aldens take a summer trip to the New England coast, they have a fun place to stay: a lighthouse! But strange things happen after it gets dark - an unknown woman is seen walking around and Watch, the Aldens' dog, wakes up growling late at night. Can the Boxcar Children shed light on a seaside mystery?