Complex sentence: After several years of tinkering with drafts, Paley abandoned the project and turned back to short fiction and, with the aid of Donald Barthelme, assembled a second collection of fiction in 1974, "Enormous Changes at the Last Minute".
Split into simpler sentences: After several years of tinkering with drafts, Paley abandoned the project and turned back to short fiction. Instead, with the aid of Donald Barthelme, Paley assembled a second collection of fiction in 1974, "Enormous Changes at the Last Minute".