Someone: Photographs pages of a book in a book store

OP: “Hello Police? Someone is stealing a book!”

Piracy explicitly is not stealing. Theft requires denying the owner of the ability to use the thing that is stolen. Copyright infringement does not meet this bar, and is not a crime in the vast majority of cases. Commercial copyright infringement is the only offense classed as a crime, which in a nutshell is piracy for profit ie selling pirated material.