Theodor Reik 
Surprise And The Psycho-Analyst [PDF ebook] 
On the Conjecture and Comprehension of Unconscious Processes

First published in 1999. This is Volume XIV of twenty-one of a series on Cognitive Psychology. Written in 1936, this book seeks to describe what is required of an investigator into the unconscious mental processes of another person, and what he achieves. By describing the psychological process of cognition from within, the author intends at the same time to trace the way from conjecturing to comprehending the unconscious processes.