Sammy Looker, the aptly named reader at Constable, joined the firm in 1923 and was still there 40 years later. It was always possible to tell when a manuscript had been read by Looker as the pages tended to stick together, given Looker's tendency to eat fishpaste sandwiches while reading.
The author of Something Nasty in the Slush Pile has chosen to use Sammy's name as a nom de plume.