I've long wanted to catalogue the issues of Super Detective Library that contained Rip Kirby strips and a recent listing on ebay gives me a chance to do just that...
These are the issues of Super Detective Library you're looking for...
#120 - Rip Kirby and the man who stole a million dollars
#122 - Rip Kirby in duel with danger
#124 - Rip Kirby in desert fury
#126 - Rip Kirby and the runaway lady
#128 - Rip Kirby and the fatal target
#130 - Rip Kirby and the race of death
#132 - Rip Kirby on terror island
#134 - Rip Kirby and the clue of the vanishing gun
#136 - Rip Kirby's dangerous manhunt
#138 - Rip Kirby and the trail of terror
#140 - Rip Kirby and the mystery of the prisoner of Doom castle
#142 - Rip Kirby and the case of the man from nowhere
#144 - Rip Kirby's invitation to danger
#146 - Rip Kirby in design for murder
#148 - Rip Kirby and the devil's henchman
#150 - Rip Kirby and the case of the crooked mile
#152 - Rip Kirby and the playground of fear
#154 - Rip Kirby and the case of the phantom film star