Claim: The Inhabitant of the Lake and Less Welcome Tenants is a collection of fantasy,  horror,  short stories and, in 1964 was J.  Ramsey Campbell's first published book which he later republished in an expanded version.
Evidence: Fantasy, horror J. Ramsey Campbell It was released in 1964 by Arkham House in an edition of 2,009 copies and was the author's first book. The original book was reissued in an expanded and illustrated version promoted as a 'fiftieth anniversary edition' by PS Publishing in 2011.