Casebook #2 in this exciting series gives Sherlock Holmes and the Baker Street Irregulars a most unusual case to crack! A young woman named Elsa Hoffman seeks out the detective when her aunt dies mysteriously. As Ozzie, Wiggins, and the gang start investigating, seemingly real ghosts suddenly appear and Elsa is followed by shady characters. Holmes must decide if he and his assistants can solve the case without facing mortal danger. Join the Irregulars for a mysterious and frightening adventure and decide if this is a case of the supernatural or dark con men, thieves, and murderers!

Praise for Sherlock Holmes and the Baker Street Irregulars Casebook #1 THE FALL OF THE AMAZING ZALINDAS:

"Mack and Citrin's fast-paced, suspenseful story will keep readers turning the pages." -THE BOSTON HERALD

"[A] fast-paced, authentically styled caper." -KIRKUS REVIEWS

"[A]n entertaining, suspenseful read for youthful crime buffs." -BOOKLIST