The Dark Dimensions & The Rim Gods

This is a 1981 Ace Science Fiction publication with two A Bertram Chandler Novels bound together as one.

Dragons? Fairies? Frog Princes? Sir Dominik Flandry?
In a John Grimes Rim Advendture? Strange things happen out where the stellar medium grows thin, out where it is difficult to say if you remain within the galaxy or you're falling through the intergalactic void. Add to that strangeness an Outsider ship filled with technology so far in advance of the human as to appear magical, and the catalytic presense of Commodore John Grimes, and anything can happen - anything at all.