The Penguin English Library edition Many readers would claim that The Adventure of the Copper Beeches or The Man with the Twisted Lip was their favourite Sherlock Holmes story - but then that would be doing an injustice to The Adventure of the Yellow Face and The Problem of Thor Bridge . It is just as well that in the end we do not have to choose - as if we did then there would be no doubt it should be The Adventure of the Six Napoleons .