Dalek Survival Guide

Written in the late 20th or early 21st centuries, the Dalek Survival Guide was a handbook produced to be the most comprehensive guide to the Daleks assembled since Earth was first alerted to their threat with Terry Nation's discovery of the Dalek Chronicles. It was published no more than 50 years after the launch of the first communications satellites and Yuri Gagarin's historic space flight. The guide also served the purpose of equipping its reader with the necessary information in the event of an invasion. (PROSE: Dalek Survival Guide)

Intelligence
The Dalek Survival Guide identified three distinct types of Dalek Drone: the Type 1, silver with blue sense globes, the Type 2, grey with black sense globes, and the Type 3, modified silver Daleks with black sense globes. (PROSE: Dalek Survival Guide)