How many books has Julian Opie written or featured in?

Julian Opie is known for his visual art, primarily sculptures and digital artwork. He is not an author and has not written any books.

However, there have been numerous books published about his work, including:

* Julian Opie: Portrait of a Century (2012)

* Julian Opie (2001)

* Julian Opie: Paintings, Drawings, Sculpture (2007)

* Julian Opie: The Complete Prints (2011)

These books provide detailed information about Opie's artistic practice, his influences, and his work over the years.