FYI - Having had a look through
Nick Perumov's works, I noticed he had co-written a book with the well known American writer
Allan Cole (who I have now discovered, passed away

from Cancer earlier this year).
I tried to find that as an ebook on Amazon, but no luck. I did find another he co-authored with him (
The Hate Parallax), and a solo work (
Godsdoom), that gets many 5 star reviews. Both are quite cheap as ebooks go.
I decided to take a punt, and get both ... I sometimes do that, but not very often in the last 30 years.
I was also amazed to discover a co-written Doctor Who ebook by my favorite Doctor Who actor, Tom Baker, so grabbed that as well -
Doctor Who: Scratchman. I read his self-penned biography not long ago.
PASSING COMMENT - Sometimes you gotta laugh at what pops up, and in this case absolutely no idea why ... unless it is somehow related to the word, Godsdoom ... certainly I haven't done any browsing or searching at Amazon that would bring the result up. What I am talking about, is the single ebook advert on the web page, for -
Anus: Surgical Treatment and Pathology. Amazon and their damn algorithms.