I’m afraid not! Although most of my designs are specifically created with the intention to produce easy-to-follow patterns from them, I sometimes crochet art pieces which are one-of-a-kind pieces and a) far too complicated to make into patterns and/or b) fan art involving trademarked characters such as the Discworld and Reepicheep (I can’t make a profit on unlicensed merchandise; it wouldn’t be legal).
But, you can buy patterns for some of the non-trademarked elements of my art pieces, e.g. Discworld’s Elephants and Sea Turtle, Reepicheep’s Water Lily, Columbo’s Dog…