"Joe 90" was also given its own weekly comic, "Joe 90 Top Secret", published by City Magazines, which ran for 34 issues and presented the TV episodes in strip form, while also including strips based on the TV shows "The Champions" and "Land of the Giants". In September 1969, "Joe 90 Top Secret" merged with "TV21" (formerly "TV Century 21") to form "TV21 and Joe 90". After a further 36 issues, the "Joe 90" strips were dropped and the title reverted to "TV21". Other print media included 1968 and 1969 "Joe 90" annuals by Century 21 Publishing/City Magazines as well as two short novels by May Fair Books: "Joe 90 and the Raiders" and "Joe 90 in Revenge".