Of Man and Manta (Trilogy)
by Piers Anthony
Across time and space roamed the Three – the cripple, the woman, the man of brawn. Trying to unravel the mysteries of fantasy worlds, and accompanied always by the strange and weirdly beautiful Mantas.
This is the cover of the paperback I owned:
What appears to be the original covers:
I read a lot of Piers Anthony as a teenager and enjoyed his books. In re-reading this it became apparent I have moved on from his writing. Although it starts as an interesting story, unfortunately things start to get too much like a science lecture. By the third book, it’s reading like a text book and I gave up before the end.