A Shadow of All Night Falling is a 1979 fantasy novel by Glen Cook.

Greg Costikyan reviewed A Shadow of All Night Falling in Ares Magazine #2 and commented that "Cook has managed to avoid most of the traps into which fantasy writers tend to fall.

His language, while striking, is not awkwardly archaic; he communicates some of the awesomeness that is the province of epic fantasy without seeming silly or mundane; his magic is believable and not trivial.

He also manages to create sympathetic characters – a difficult task in epic fantasy – and his prose is clear and well-executed.

A Shadow of All Night Falling is by no means a classic, but it shows great promise.