In the Japanese language, there is a term to design the behavior of a person who buys books only to leave them unread on a shelf at home. This term is ‘tsundoku’ and it implies the combination of the verbs ‘to read’ and ‘to pile up’. Hence, the meaning ‘of buying reading material only to have it piled up’. However, the word itself bears no offense to the people who associate themselves with it.

... or the collection addiction, was first spotted in Thomas Frognall Dibdin’s novels and it describes the unstoppable act of collecting first editions and illustrated copies of literature. 

Later on, the same term would describe a person who is more passionate about rather than obsessed with building up a collection of literature.