John le Carre wrote fiction espionage novels. Espionage novels are novels which focus on a spy's life or spying in general. His most famous work is The Spy That Came In from the Cold.
The definition of a ditz is slang for someone who is silly or who seems to have scattered thinking. An example of ditz is a silly dumb person who just giggles all day. ditz. Slang a person thought of as being flighty, eccentric, silly, etc. ditz.
Second, Ditra is a decoupler, meaning (in this case) there's no chemical bond between the tile and the subfloor. With cementboard, the tile is mortared to the cementboard and the cementboard is mortared to the substrate, so there's a chemical bond. proprietary product created by Schluter Systems, Ditra is a polyethylene decoupling membrane designed to manage movement in wood and many other types of floor systems to prevent cracking and other problems with tile installations.