A while back I got a chance to preview the cover for Challenge Accepted and it is spot-on. The person who did the cover really captured the essence of the book. The designer used a sort of strike poster template and added an image I sent to Michigan State University Press. The image is from a Työmies publication that has not seen the daylight in probably 90 or more years. The labor cartoon depicts the awakening of mineworkers in the Copper Country.
The really unique aspect of this cartoon, drawn by Konstu Sallinen, is that it shows this "mental" awakening by depicting a physical event that portrays a mineworker standing up to shake the very foundations of the Copper Country's ground. This action, by the purposefully enlarged laborer, sends the copper bosses running. The theme of proletarian awakening and revolt is one that was sounded frequently by Finnish immigrant socialist-unionists and one that the book explores in-depth.