The Medford Public Library is co-sponsoring a new online program, “Author Hour in Massachusetts.” In this installment, 2024 Mass Book Award finalist Larry Rohter will discuss his new book, “Into the Amazon: The Life of Cândido Rondon, Trailblazing Explorer, Scientist, Statesman, and Conservationist.” The book is a thrilling biography of the Indigenous Brazilian who guided Theodore Roosevelt on his journey down the River of Doubt in 1913-14. Rohter was the Rio de Janeiro bureau chief for the New York Times from 1998 to 2008 and held the same role at Newsweek from 1977 to 1982. Register through the library’s new online calendar to receive the Zoom link.