Signed copies of Chapters 1 & 2 of Knifestone in convenient Photocopy & Staples format, a custom drawing of your choice, and a thank you in the final book.
The $5 perk, as well as a signed copy of the final printed book.
The $5 & $10 perks, as well as a larger, full-colour drawing on heavier paper (suitable for framing, if you're that sort of person).
The $5, $10, & $40 perks, as well as the original pencil art from the page of your choice (from page 76 onwards. I used to produce things differently before that and penciled pages no longer exist).