The Harlequins are lightning-fast warrior acrobats. Enigmatic beings who do not differentiate between war and art, applying their lithe, inhuman grace to both without distinction. Sinister, mysterious and mercurial, they wage a never-ending guerrilla war against the servants of the Ruinous Powers in the name of their Laughing God. 96 page, full color hardback.
Games Workshop Group PLC (often abbreviated as GW) is a British miniature wargaming manufacturing company. Games Workshop is best known as developer and publisher of the tabletop wargames Warhammer, Warhammer 40,000 and The Lord of the Rings Strategy Battle Game.
I found the fluff in this codex superior to other codices, probably because Harlequins as an army are rather unique and because the codex was so much shorter than similar codices.