Attention-shy writer Dan Brown completed three days of tough courtroom scrutiny Wednesday, acknowledging that he reworked other writers’ material but rejecting claims he copied two authors’ work for his mega-selling thriller “The Da Vinci Code.”

Appearing as a witness for his book’s publisher Random House, Brown appeared increasingly tired during lengthy cross-examination that dwelled on the details of his research process and minutiae such as whether the word “savior” should be spelled with a “u.”