Silent film comedy stars Harry Langdon and Ben Turpin inhabit the middle tier of fame. They're not among the silents' A-list -- Charles Chaplin, Buster Keaton, Harold Lloyd -- but they're above Andy Clyde, Billy Bevan, Larry Semon and a host of others. Turpin, by virtue of his crossed-eyes, is an iconic character, even if many who recognize the face can't place the name. Langdon, who rivaled Chaplin in his ability to produce emotion, pathos and laughs with a mere shifting of his eyes, was directed by Frank Capra, and co-starred with a very young Joan Crawford in his salad days.There are two biographies, one recent, one new, that detail the careers and lives of Langdon and Turpin in loving detail. Both are products of the genre-intensive small press, where several hundred-page biographies and analyses are read by devoted genre fans and historians, who love the minutia, look for new historical nuggets, and spot clues toward new information. "Little Elf: A Celebration of Harry Langdon," by Chuck Harter and Michael J. Hayde, 2012, Bear Manor Media, Duncan, Okla., and "For Art's Sake: The Biography & Filmography of Ben Turpin," by Steve Rydzewski, 2013, also Bear Manor Media, (http://www.bearmanormedia.com/) are examples of the genre. They are labors of love, intensely interesting for any reader, and intensely satisfying for fans. The books are thick, overflowing with information, and rather expensive due to their small press runs, although Kindle editions are much cheaper.