Though it contains material from as early as 1990, In Extremis mostly consists of recordings from 1996 to 1998. The music skirts the more challenging end of avant-prog, with good contributions from drummer David Kerman and vocalist Deborah Perry. Thinking Plague is a United States avant-garde progressive rock group founded in 1982 by guitarist/composer, Mike Johnson, and bass guitarist/drummer, Bob Drake. Based in Denver, Colorado, the band has been active off and on since 1982, taking on a number of musicians over the years. They have made six studio albums between 1984 and 2012, and released one live album recorded at NEARfest in 2000.