A Feb. 27 trial was set Thursday for the suit against Random House filed by Michael Baigent and Richard Leigh, the authors of "The Holy Blood and the Holy Grail," the BBC reported.
Their book recently reissued by Random House examines the theory Jesus married Mary Magdalene and they had a child, so their blood line continues today, the BBC said.
The authors claim Brown's similar book is "theft of intellectual property." Random House denies the charge.
The third author of the collaboration, Henry Lincoln, is not participating in the lawsuit because of ill health, the BBC said.