Complex sentence: Glaser alone wrote the second methodology "Theoretical Sensitivity" (Glaser, 1978) and has since written four more books on the method and edited five readers with a collection of GT articles and dissertations (see Literature at end).
Split into simpler sentences: Glaser alone wrote the second methodology "Theoretical Sensitivity" (Glaser, 1978). And has since written four more books on the method and edited five readers with a collection of GT articles and dissertations (see Literature at end).