From the Pelgrane website:
The limited edition will include:
A limited edition faux leather bound, gold-embossed copy of Bookhounds of London, signed by Kenneth Hite with a Lovecraftian word added in his fair hand. The full list of 110 words will be published after the books are released.
A limited edition of Augustus Darcy’s Occult Guide (Liber Fumo de Frater Viglio) presented as an in world-artifact, hardbound, cloth covered, numbered, gold embossed with an exclusive dust cover. To the extent we can, we have left no trace of its modern origins. You get the PDF of the Occult Guide now with your order.
Genuine 1930s ephemera selected from by Steve and Paula Dempsey (contributor and Occult Guide writer respectively), divided as evenly as possible between each limited edition. While some people will do better than others we think no one will be disappointed.
A unique clue to the death of Augustus Darcy.
All this presented in Augustus Darcy’s olive green haversack, protected by a mystic sigil.