You might be interested in reading The Years of Lyndon Johnson by Robert Caro book series about him. It's incredibly well written and engaging, while also being

You might be interested in reading The Years of Lyndon Johnson by Robert Caro book series about him. It's incredibly well written and engaging, while also being academically rigorous, well researched and well documented. It's an (incomplete) 5 book biography-ish, maybe 4000+ pages - but also somehow a riveting page-turner.