Two stories:

66-page The Adventures of Big Johnson Bone, Frontier Hero, written by Tom Sniegoski and drawn by Jeff Smith.

25-page Riblet written by Tom Sniegoski and drawn by Stan Sakai.

From the publisher:

Reveals the story of Big Johnson Bone, the discoverer of the Rolling Bone River and the founder of Boneville.

Tall Tales: The Adventures of Big Johnson Bone, Frontier Hero is a prequel to the Eisner Award-winning comic book Bone by Jeff Smith. It was initially published in 1998 as a three issue mini-series.

Whereas the other spin-off, Rose, focuses on the valley people from the story, Stupid, Stupid Rat-Tails focuses on the formation of Boneville, the hometown of the Bones. The series is drawn but not written by Smith. The writer is Tom Sniegoski. The back-up feature included in the trade paperback collection, Riblet, is written by Sniegoski and drawn by Usagi Yojimbo creator Stan Sakai. The series was yet again reprinted in the collection Tall Tales, released in August 2010