Seven Keys to Baldpate by Earl Derr Biggers ebook Free, Whispersync Audiobook - $2.99
https://www.amazon.com/gp/product/B00P8KUDEA
After years of churning out potboilers, novelist Billy Magee decides that he needs just two months of solitude to produce a work of true literary merit. New York is too crowded with distractions, so he embarks on a journey to the loneliest place he knows: a rambling summer resort that has been closed for the winter. He plans to live by candlelight and firewood for the next eight weeks, with nothing to do but write. On his very first night at Baldpate Inn, however, Magee receives an unwelcome visitor. For some reason, the man is very nervous. Could it have something to do with the revolver clutched in his hand? Magee was promised the only key to the hotel, but five more peculiar interlopers arrive, each with a key. It is clear that the author is caught up in a strange and baffling plot. The question is, who’s pulling the strings? Magee hopes to find out soon, lest he turn up dead before he can start his book.
Earl Derr Biggers is best known for his Charlie Chan Detective stories that was turned into a series of popular movies the best of which IMO star Sidney Toler.
https://en.wikipedia.org/wiki/Charlie_Chan