9781840225297 is an ISBN of a currently-available edition of The Casebook of Carnacki the Ghost Finder, which has all nine of Hodgson's Carnacki stories, and appears to be an inexpensive paperback -- Amazon has it for $7 and there are used copies (although of course with the shipping they're only going down to $4.99 right now :P ). It's also findable through Indiebound.com, of course -- I just used Amazon to actually look at the table of contents.

Also, as part of the Stone Telling team, I protest this notion of letting another venue do anything at all with all of your poems! :P