The Mind Readers (Albert Campion Mystery, #18)

Mind over murder
Two schoolboys have discovered a miraculous gadget that enables them to read other people’s minds. Then one of the children vanishes—and Albert Campion is called in to crack the case. Soon the intrepid sleuth becomes snared in a sinister web of conspiracy, violence, and assassination—and in a lethal power play for control of a devastating device that could shatter the world!
Mystery at its British Best
Equally at home in the underworld and among the upper crust, super-sleuth Albert Campion rarely misses a clue or fails to find a motive. Behind his horn-rimmed glasses and mild-mannered facade is a brilliant mind that can penetrate to the villainous heart of the most heinous crime.