Between 1967 and his death from lung cancer in 1975, Blish wrote authorized short story collections based upon the 1960s TV series Star Trek. He wrote 11 volumes adapting episodes of the series. He died midway through writing Star Trek 12; his wife, J. A. Lawrence, completed the book, and later completed the adaptations in the volume Mudd's Angels. In 1970 he wrote Spock Must Die!, the first original novel for adult readers based upon the series.