I did not know at first that it would be a series; I discovered after the first novel that I had more to say about it, so I did another. And another, and then the readers demanded yet more.
Piers AnthonyAt this slower pace the journey took a couple of days, and I fought off a few minor threats along the way --griffins, carnivorous plants, giant serpents, hostile centaurs, that sort of thing, purely routine --and I was beginning to get bored when at last the dusky towers of Castle Roogna hove into view.
Piers Anthony