A five-star mystery now available in paperback! Ted and Kat watched as their cousin Salim boarded the London Eye, but after half an hour, it landed and everyone poured out – except for Salim. Where could he have gone? How could he have simply vanished into thin air? Ted and his older sister Kat become detective partners as the police struggle to make progress. Despite their tense relationship, they put aside their differences to follow a trail of clues through London in a desperate attempt to find their cousin. Ultimately, it’s up to Ted, whose brain works in its own unique way, to unlock the key to the mystery. This is a gripping, nail-biting thriller – a race against time. "Everything here feels truly authentic, the family dynamics, the quirky connections of Ted's mental wiring, and perhaps most surprisingly, the mystery." – Booklist, starred review "The best mysteries have at their core.