But there's a rival detective on the case, a paranormal investigator who claims that only he can capture this phantom thief. With the help of their new friend, girl scientist Peril Abernethy, Artie and Ham follow a trail of baffling clues and impossible dangers, but can they catch the Phantom before the invisible fiend pulls off the greatest robbery in history?Robert J. Harris, author of The World's Gone Loki series and Will Shakespeare and the Pirate's Fire, brings the young Conan Doyle to life in the third instalment of this ingenious detective series full of twists, turns and clever reveals.
