Jabarkan Buku permainan dari Michael O. Varhola

Experts. Skirmisher, 2002.  (dengan Paul O. Knorr)

Warriors. Skirmisher, 2003.  (dengan Paul O. Knorr, Sharon Daugherty, dan David L. Thomas)

Tests of Skill. Skirmisher, 2004.  (dengan Paul O. Knorr)

Nuisances. Skirmisher Publishing, 2005.  (dengan Sharon Daugherty)

Experts v.3.5. Skirmisher, 2005.  (dengan Paul O. Knorr and Perry Frix)

Nation Builder. Little Rock, AR:Troll Lord Games, 2005.  (dengan Gary Gygax)

H.G. Wells' Little Orc Wars Quick-Play Rules. Skirmisher Publishing, 2007.  (dengan H.G. Wells)