The Two-Headed Serpent is available now in hardback, direct from Chaosium.com!
(If you previously bought the PDF, you'll receive a discount coupon by email).
Should add—Availability Notice: The Two-Headed Serpent will be arriving in Australia on or around June 24th. Australian orders received prior to its availability will be flagged as pre-orders.
The Grand Grimoire will go on sale at Chaosium.com in the first week of July.