Brain Twister
Author: first_name: Randall
last_name: Garrett
first_name: Laurence M.
last_name: Janifer
Language: English
Year: 1962

"Mark Phillips" is, or are, two writers: Randall Garrett and Laurence M. Janifer. Their joint pen-name, derived from their middle names (Philip and Mark), was coined soon after their original meeting, at a science-fiction convention. Both men were drunk at the time, which explains a good deal, and only one has ever sobered up. A matter for constant contention between the collaborators is which one.<br /><br />Originally published as That Sweet Little Old Lady, Brain Twister follows the adventure