For more than two decades, Bob Crawford has toured the country as the bassist for the Avett Brothers. But long before he began his career as a musician, he was obsessed with American history. After turning that obsession into two podcasts, he has now written his first book, “America’s Founding Son: John Quincy Adams, From President to Political Maverick.” On this week’s episode, Crawford talks with Gilbert Cruz, the editor of The New York Times Book Review, about what it was like writing a book for the first time and the authors who have inspired him. In addition to discussing what he loves about John Quincy Adams, the country’s sixth president and the son of John Adams, Crawford also talks about the research he did for the book. That included scouring Adams’s 14,000-page diary. “He’s not a perfect man — he’s far from perfect,” Crawford said of Adams. “But he’s so human. He’s suffered depression, and just the humanness in his diary, not to mention the actual historical narrative, is just incredible.” Illustration by The New York Times; Photo: Jenn Ackerman for The New York Times Subscribe today at nytimes.com/podcasts (http://nytimes.com/podcasts) or on Apple Podcasts and Spotify. You can also subscribe via your favorite podcast app here https://www.nytimes.com/activate-access/audio?source=podcatcher. For more podcasts and narrated articles, download The New York Times app at nytimes.com/app.