Games Workshop is taking orders for their new Iyanden Eldar codex over on their website.
From the announcement:
Iyanden is a 72-page full-colour hardback supplement to Codex: Eldar, complete with a dust jacket. It contains 32 pages of new, rich and expanded background detailing craftworld Iyanden, along with original art, box-outs, a timeline, and iconography of Ghost Warrior houses. It features a showcase of glorious Citadel miniatures presenting the colour schemes and iconography of the Iyanden craftworld.