From The Boxcar Children series, readers will join the Alden kids on Spring break in The Sea Turtle Mystery by Gertrude Chandler Warner. The family is not just soaking up the sun, they are spending their time protecting the endangered sea turtles! The kids are marking the turtle nests so they can be moved to a safe place to hatch. The only problem is that someone is digging up the eggs without permission. Will the kids figure out what is going on and save the turtles? Paperback, 128 pages. Recommended for ages 8 to 10 years old.