Swords Against Wizardry

Swords Against Wizardry is a book by Fritz Leiber.

It is the fourth in the canonical series concerning Fafhrd and the Gray Mouser.

In the Witch's Tent
Fafhrd and the Gray Mouser are consulting a witch (the archetypal disgustingly ugly and smelly old hag), for the reason that it is prudent to do something of the kind before undertaking a major enterprise.

They are planning on climbing Stardock, the highest (or at least, the most notorious) mountain in Nehwon, as there are rumours of treasure at the top.

It turns out they're not the only ones with that idea, as they are attacked, and barely escape (as usual). They believe their attacker was one Gnarfi, whom the pair know as a competitor in trade.

And so the stage is set for the next episode.

Stardock
Fafhrd and the Gray Mouser are climbing Stardock, a beautiful and challenging mountain in the Cold Wastes. Fafhrd claims to know the area and its mountains well. His father perished on White Fang. They discuss Gnarfi and Kranach, another pair of rogues who are also attempting to climb this mountain.

During the climb they are accompanied by Hrissa, an ice-cat. It is an eventful climb, and they are beset by various fauna, including a giant white fur-covered snake. Hrissa does her part in fighting off the inimical wildlife.

Finally they reach a place near the top, where they are welcomed into a cave, in which dwell the invisible rulers of this realm. They have already upset Prince Faroomfar, but find romantic solace with his sisters Hirriwi and Keyaira. Apparently the race of people up here need the seed of heroes from below to continue their race.

But they get kicked out of bed after a day and a night, and have the rest of the climb to finish. This they do without too much trouble, but this time without Hrissa, who has stayed inside (and may well have originated from Hirriwi and Keyaira in the first place).

At the top of the mountain they encounter their enemies Gnarfi and Kranach, and embark on the usual mayhem. The invisible dwellers of the mountain also get in on the act, and as a result of all this boisterous behaviour, our two heroes (along with Hrissa, who has reappeared to warn them of the invisible army) are tipped off the mountain. But all is not lost, as Keyaira and Hirriwi (mounted on an invisible flying beast of some kind) rescue the two of them and set them down safely on the ground at the base of the mountains.

And our heroes have come away with a profit: each has a pouch filled with gems so precious that they are visible only in darkness.