#1

Pre-sold to Kickstarter backers as a bundle with Cochlea & Eustachia, Volume Two. The above-listed "On Sale" date reflects when general shipping/fulfillment was first announced as completed in an update to crowdfunding backers. This volume has no price printed on it, though the lowest-cost tier that included a physical copy of both volumes was US $55.00. (source) Following delivery of the crowdfunded rewards, remaining copies of Volume One were offered directly via Rickheit's online shop for US $25.00. (source)

While neither the cover nor spine has a volume number denotation, the colophon states this as Cochlea & Eustachia, Volume One, 2nd Printing (presumably in deference to the previous Fantagraphics edition).