Amanda Lester and the Purple Rainbow Puzzle

Hackers. Kidnappers. Zombies. With the Lake District so explosive, Amanda must figure out who's threatening the detectives before they get her too. But when the sky begins to crackle with purple rainbows, she discovers that the only way to save her friends is to confront an old adversary . . . and a new one who's even more dangerous.
Whether you are ten or a hundred you will love this exciting tale readers are calling "Sherlock Holmes meets Nancy Drew meets Harry Potter."