Conversation so far:
Did Brown commit copyright infringement?
In August 2005 author Lewis Perdue unsuccessfully sued Brown for plagiarism, on the basis of claimed similarity between The Da Vinci Code and his novels.
Did brown write novels?
his 2003 novel The Da Vinci Code.
What other novels did he write?
Angels & Demons (2011-12).
Were there other copyright cases?
Brown has been sued twice in U.S.
Federal courts by the author Jack Dunn who claims Brown copied a huge part of his book The Vatican Boys.
What was the outcome of that lawsuit?
).
Both lawsuits were not allowed to go to a jury trial.

Question: Who else sued him?
Self-contained rewrite: Besides author Jack Dunn, Who else sued Dan Brown?