This is Ruby's fourth adventure. This time Ruby has become so fearless that she has started taking risks. Risks lead to danger and danger gets you dead - except Ruby doesn't die.
Instead, she follows a path of clues to lead her to the identity of the mysterious skywalker who has somehow got their hands on an invisibility cloak! But Ruby doesn't get it right first time and it has almost disastrous consequences.
I really like this book because Ruby is my favourite character and I especially like the bits where she's figuring out codes. I also like the way Ruby has a different way of looking at everyday things when she's solving a mystery.
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