Thomas W. Hanshew 
Cleek, the Master Detective [PDF ebook] 

Hamilton Cleek is blessed with the unusual ability to change his appearance at the drop of a hat by manipulating his facial muscles. For much of his early life, he used this skill for nefarious purposes, becoming a master thief in the process. But when a sudden change of heart compels him to give up his life of crime, Cleek decides to use his gift for disguise and his powers of ratiocination to solve crimes.