and the baker street irregulars Mack. Tracy creator Citrin. Michael text New York Orchard Books 2009 First paperback edition, April 2009 monographic 255 pages : 20 cm The ragamuffin boys known as the Baker Street Irregulars help Sherlock Holmes solve the mysterious deaths of a family of circus tightrope walkers. 850 Lexile Tracy Mack & Michael Citrin Mystery PZ7.M18995 Fic 9780545069397 FISKH 20240229151347.0 3200 eng