"I was particularly interested because it was said to be a continuation of Arthur Machen's The Three Imposters. And indeed it is dedicated to Machen, the chapter headings are in the style of the Machen book, and there is an `Epilogue by the Author' about the earlier book - but I don't think Machen would have much cared for the tribute! This is a lurid thriller with none of Machen's subtlety or skill with language. It resembles The Three Imposters mostly in that the plot is quite impossible to follow." [info from fanac.org PDF of Ned Brooks' It Goes on the Shelf No. 9, October 1992]
Data from Amazon and Worldcat.
Other prices on back cover in FantLab photo: Australia $2.75, New Zealand $2.75, Canada $1.95, Eire 93½p, Malta 85¢. Epilogue's page # from FantLab photo of contents page.