37 books • 13 series
El Detective Zacarias: El Misterio del Sombrero Rojo = Detective Zach (Detective Zacarias)
Mystery at Thunder Mountain (Detective Zack (Unnumbered Prebound)) (Detective Zack (Unnumbered Paperback))
Missing Manger Mystery (Detective Zack (Numbered Prebound), #6) (Missing Manger Mysteries)