Amazon has The Wrinkle in Time Quintet Boxed Set (Paperback) on sale for $10.99. Shipping is free w/ Prime or orders $25 & over. Finally bought it after having it in my cart for a while. It’s been hovering around $30 last few month. So this is a very nice drop.
This set includes:
A Wrinkle in Time
A Wind in the Door
A Swiftly Tilting Planet
Many Waters
An Acceptable Time