Conversation so far:
When did Dan Brown become a songwriter?
In 1991 he moved to Hollywood to pursue a career as singer-songwriter and pianist.
What was his first published song?
in 1990 self-published a CD entitled Perspective.
Was it successful?
sold a few hundred copies.
What did he write next?
In 1994 Brown released a CD titled Angels & Demons.
Was it successful?
CANNOTANSWER.

Question: Did he release any more music after that?
Self-contained rewrite: Did Dan Brown release any more music after Angels & Demons?