This is probably the book that is most responsible for my interest in fantasy and roleplaying. It was published in 1971 by Mayflower and cost 25p. I don't know how I came across it but I first remember it when I was about eight or nine. After we moved to France, my Mum gave it to a second hand bookshop because it was so worn that she thought it unloved. Quite the opposite - I made her drive to the shop where I had to pay 7FF to get it back.
It was probably my first introduction to Elric, Conan, and Fafhrd and the Grey Mouser. In chilledchimp's terms it probably has a lot to answer for.
Thanks to this site, here is the list of contents:
9 • Introduction (Warlocks and Warriors) • essay by Douglas Hill
12 • The Sleeping Sorceress • [Elric] • novelette by Michael Moorcock
49 • The Curse of the Monolith • [Conan] • (1968) • short story by L. Sprague de Camp and Lin Carter
62 • The Ogyr of the Snows • short story by Martin Hillman
79 • The Wager Lost By Winning • [Traveller in Black] • (1970) • novelette by John Brunner
113 • The Wreck of the "Kissing Bitch" • (1971) • novelette by Keith Roberts
135 • The Unholy Grail • [Fafhrd and the Gray Mouser] • (1962) • novelette by Fritz Leiber
They are all cracking stories, even the second generation Conan, with Lovecraftian overtones, about how he almost falls into a trap. I've not read anything else by Martin Hillman but the story of fighting an Ogre in the snow with half a halberd stirred my young imagination. It was supposedly part of a longer work but I don't think it was ever published.