Quotes from book
Climbing Mount Improbable

Climbing Mount Improbable is a 1996 popular science book by Richard Dawkins. The book is about probability and how it applies to the theory of evolution. It is designed to debunk claims by creationists about the probability of naturalistic mechanisms like natural selection.The main metaphorical treatment is of a geographical landscape upon which evolution can ascend only gradually and cannot climb cliffs . In the book, Dawkins gives ideas about a seemingly complex mechanism coming about from many gradual steps that were previously unseen.

“Mutation may be random, but selection definitely is not.”
Source: Climbing Mount Improbable (1996), Chapter 3, “The Message from the Mountain” (p. 82)