From Brasilia, the former President, now 43 years old, responded with a statement "to the Brazilian family," warning about his 41-year-old brother's "sick hatred" and "paranoid delirium."

"Our homes are being invaded by a repugnant and lying tale," Fernando Collor said. "In the name of God, enough!"

With 16 books about the Collor scandal in print, some Brazilian booksellers are calling for boycotts "for moral reasons." But Brazilians are showing a hearty appetite for scandalous details surrounding the Collor presidency, a glamorous era once trumpeted as "Brazil's Camelot." Within two weeks of its publication, "1,000 Days" had sold 35,000 copies, earning about $250,000 for its author.

But on March 18, a Sao Paulo judge, acting on a lawsuit by a former Collor Cabinet minister, ordered a freeze on all proceeds from sales of the book. The scandal has spawned nine libel suits in the last month, including the one by Mr. Tourinho.

In the book, Mr. Rosa e Silva says that during the 1989 presidential campaign, Collor advisers bought the silence of the mother of James Fernando Braz da Silva, the candidate's secret, illegitimate son. At the same time other Collor advisers were paying another woman to make tearful appearances on national television to publicize the fact that Mr. Collor's runoff opponent, Luis Inacio (Lula) da Silva, was the father of her illegitimate daughter. With her pension apparently cut off by Mr. Collor's impeachment, the woman, Miriam Cordeiro, recently said she was writing her own memoirs.

Brazil's Supreme Court is expected to announce this month that it will try the former President on charges of corruption and of criminal association. This month the court froze about $200,000 worth of properties owned by Mr. Collor, and a Brasilia judge withdrew bodyguards and drivers who had been provided for Mr. Collor at Government expense. Sentenced to Prison

Last month a Brasilia judge sentenced Mr. Rosa e Silva to one year in prison for defaming a Congressman in 1991. This time, the former presidential spokesman faces three libel suits. Those who follow the Collor story had barely digested this when Pedro Collor decided it was, once again, time to talk.