Ruby Redfort: Undercover agent, code-cracker and thirteen-year-old genius – there’s nothing average about her. Only this time it’s an adventure in the wild, and it’ll take all Ruby’s got just to survive...

Thirteen-year-old Ruby, a genius code-cracker and daring detective, gets an anonymous call setting a challenge that leads her to the headquarters of Spectrum, a highly secret anti-crime agency that needs her help to crack a code, but soon Ruby uncovers dastardly plans of the Fool's Gold Gang.

Crack open Ruby Redfort’s second adventure — and you will literally be on the edge of your wits. Everyone’s favorite girl detective is back for a second mind-blowing installment, packed with all the off-the-wall humor, action, and friendship of the first book. This time, though, it’s an adventure on the wide-open ocean, and Ruby is all at sea. . . . Can she crack the case of the Twinford pirates while evading the clutches of a vile sea monster as well as the evil Count von Viscount? Well, you wouldn’t want to bet against her.

Got a sixth sense for trouble? Read on, buster. Our favorite girl detective calls on her gut instincts in an exciting grand finale of the Ruby Redfort series. Ruby Redfort: you can count on her when the ice starts to crack. Falling through the air at 120 miles per hour? Just relax and think fast. But now even Ruby Redfort is running scared. A bunch of people want her dead, and worst of all, one of them is on her team. When your name is first on a mastermind’s hit list, do you lock the doors, switch off the lights, and wait for someone else to do something? Or do you get out there and save yourself? If you’re Ruby Redfort, genius code breaker and undercover agent, the choice is clear: death or glory. In a satisfying series finale, surprises are in store and Spectrum’s backstory comes to light as fans bid good-bye to Ruby Redfort, every smart kid’s smart kid.

Originally published: London, England: HarperCollins Children's Books, 2015.

Ruby Redfort: Undercover agent, code-cracker and thirteen-year-old genius.

Ruby Redfort: secret agent, detective, thirteen-year-old kid. And now... survival expert.

Meet Ruby Redfort: every smart kid’s smart kid. The fifth book in the nail-biting series, created by award-winning author Lauren Child.

When someone steals the winner's trophy for the school book project, Clarice emulates her favorite book heroine, Ruby Redfort the detective.

When Charlie insists that his little sister, Lola, leave him and his friend Marv alone to play, she agrees but soon she and her invisible friend, Soren Lorensen, must come to the boys' rescue.