The Last Secret (Scarlet and Ivy, Book 6)

"My 11-year-old daughter reads a lot and loves books in general, but Scarlet and Ivy is the series she loves above all others. It’s about twins called Scarlet and Ivy who go to a school called Rookwood and solve mysteries. The plots are always really good, it’s well written and if you read one book you’ll always want to read the next, so they’re quite ‘hooking’ (as she puts it). The Last Secret is the latest and probably the last in the series, but according to her it’s also the best (though The Whispers in the Walls , the second in the series, is amazing too)."