mystery and dectective stories

Dierdre Bradley knows this is the worst time to fall in love. But she can't help herself. Robin Fear is so intense and mysterious. He always acts as if he has a big secret. He does. Robin wants to destroy Fear PArk. And he has a plan--a plan that will cost Dierdre her life.

"An enigmatic message leads the Code Busters on a treasure hunt on creepy Alcatraz Island, where they must use their problem-solving skills to unravel the mystery"--.

When their friend Sam get a letter full of riddles from an eccentric millionaire, the Boxcar children are eager to help him crack the code.