I bought "Satan" from Jesse Durko around 10 years ago. It was cut from the same plant as the one in The Book. Over the years, I've made at least 100 new plants from it, six of which are in the ground in my garden in various places. Some of them look like Irene Kingsley, some look like Satan. As matter of fact, at both Croton meetings here the same plant was identified by the "experts" as both. I've said this before, as far as I'm concerned, they're the same variety.