Originally published by Children's Book Council, 1970. Written for 1970 Children's Book Week.

Visit the world of A Wrinkle in Time in this new standalone story! This standalone chapter book gives young readers the perfect entry into the world of Madeleine LEngles A Wrinkle in Time, and lifelong fans of the Time Quintet will recognize characters and settings from A Wind in the Door, the second book in the beloved series. Thoughtful, adventurous, and unique, Intergalactic P.S. 3 is a stunning story of the power of love to span the universe. Charles Wallace Murry is old enough to start school, but his sister, Meg, and their friend Calvin know he isnt cut out for school on EarthMeg worries that hell be more misunderstood than ever. Luckily, with the help of the three celestial creatures Mrs Whatsit, Mrs Who, and Mrs Which, there is another place where Charles Wallace can get his education: Intergalactic P.S. 3, a public school in a completely different galaxy. The three children travel through time and space to reach the school, but for them all to make it home safely, Meg must undergo a test that will challenge her inner strength, her perspective, and her ability to protect the ones she loves.