The webcomic Schlock Mercenary has done a tie-in where they did a hardcover version of "The Seventy Maxims Of Maximally-Effective Mercenaries," an in-universe s

The webcomic Schlock Mercenary has done a tie-in where they did a hardcover version of "The Seventy Maxims Of Maximally-Effective Mercenaries," an in-universe self-help book that characters constantly refer to, with annotations written into the book by the characters.