The original volume name is I Cavalieri del Tempo. Note the markups on the margins!
Yes, based on reader suggestion here, I decided to get off my rump and finally check out this long-running paranormal / light horror series. It’s Italian-produced, set in London. Quite impressively, it’s been running since 1986, with well over 400 issues produced by various teams of artists & writers.
So far I’ve finished four 100-page books, and found two of the stories quite good and thought-provoking, i.e. Zed and Daisy, and the other two, rather mediocre, pulp-level fare, i.e. The Ghost of Anna Never and The Nights of the Full Moon. DD seems then to be a fertile premise, but a bit hit-or-miss in nature, perhaps down to the individual writers, their schedules, and whatever else.
EDIT: I’ve updated the above review after finishing the fourth book.
Here’s what the published cover looks like:
Btw, I found the art quite satisfactory, altho note: it’s usually produced in B&W. Some samples HERE.