House of the Long Shadows
The screenplay by Michael Armstrong is based on the 1913 novel "Seven Keys to Baldpate" by Earl Derr Biggers , which was also adapted into a famous play that gave birth in turn to several films . 
<triplet> Seven Keys to Baldpate <subj> Earl Derr Biggers <obj> author <triplet> Earl Derr Biggers <subj> 1913 <obj> work period (start) <triplet> famous play <subj> Seven Keys to Baldpate <obj> based on