President Donald Trump’s brother sued his niece in Dutchess County Supreme Court Friday in his latest attempt to block publication of her upcoming book about the president and his family.

The suit, which was filed by Robert Trump’s attorney, Charles Harder, follows the speedy dismissal of a petition filed in Queens County Surrogate’s Court in connection with the estate of Robert Trump’s father, Fred Trump. A surrogate’s court judge ruled Thursday that the case would not affect the administration of Fred Trump’s estate “one iota.”