This book was edited by Stephen Jones, who clearly has a desire to preserve the work of Basil Copper, given his efforts with this, the Solar Pons stories and Copper’s horror short fiction. This one was originally published in a butchered edition that the author disowned. Restored, it is a competent if minor novel, that certainly could have used some editing to offset Copper’s sometimes clumsy phrasing or clunky descriptive writing. The mystery here will not surprise anyone, but the atmosphere is generally developed nicely. Certain aspects of the plot would have worked better with more time spent detailing them; the wrap up presents some information that would have been more interesting if it had occurred on stage, for one example. Gothic-by-numbers basically.
Regrettably, Jones has done an astonishingly poor job with the text and significant typos and errors are present in every chapter. Your mileage may vary, but it distracted me considerably, and is deeply disappointing. Careless work.