Claim: The Inhabitant of the Lake and Less Welcome Tenants is a book that was never reprinted after the first original printing.
Evidence: The original book was reissued in an expanded and illustrated version promoted as a 'fiftieth anniversary edition' by PS Publishing in 2011. 
Most of the contents (three stories omitted) were reprinted, with some of Campbell's later Lovecraftian work, in his 1985 collection Cold Print.