Well, I just happen to havemy copy nearby.
At the end is a nice section on heroes and villains, including stats for elirc, yrkoon, gaynor the damned, moonglum, Jagreen lern, and information on other important characters.
In the monster sectoin are dragons, fire beetles, clakkars, olab and other nasties. Very nice.
There is a section on the different elric books, how to run campaigns.
Also is your standard runequest stuff: rolling up characters, professoins, backgrounds, advanced skills, equipment chapters etc. There are some nice unique to young kingdoms stuff, it is very well presented, clearer and more concise.
There is a section on summoning demons, using sorcery. Oh, since you mentioned demons there is like ten pages on using them and elementals. Also stuff for dream thieves, how to play a sorcerer...
What else, cults to the different elemental, plant, chaos, and law lords, with boons and mannerisms assoicated with there members (this is a very brief paraphrase).
There is also a big chunky 33 pages of info about the world of the young kingdoms at the start of the book, as well as many notes throughout the Elric tome on different things, like how to act melnibonean, and information on Dharzi.
I give this 8.7 out of ten. Quality, lots of good stuff, improvement on core ruels, some of the art is good, some bad, no scenario, could have more monsters, but all and all an impressive and essential book for any role player.