The Medford Public Library welcomes author Renee Dudley for a talk on her book, “The Ransomware Hunting Team: A Band of Misfits’ Improbable Crusade to Save the World from Cybercrime.” The real-life technological thriller is about a band of eccentric misfits who take on the biggest cybersecurity threats of our time. It traces the adventures of these unassuming heroes as they use their skill to save millions of ransomware victims from paying billions of dollars to criminals. Dudley is a tech reporter at Pro Publica. RSVP through the library’s online calendar.