This book, published a few years after his death, explores Hughes' life from his family background to his bizarre ending. I'll be curious to follow this book up with a more recent biography that might include further insights and research gathered over the last thirty years.
In my car, I'm listening to an audio book, "Andrew Carnegie," a portrait of the 19th and early 20th Century industrialist and philanthropist that had a major impact in those two areas that is still felt today. He began life in a small Scottish industrial town and ultimately became one of the wealthiest men of his time. He was also as far as you can get from the emotionally crippled Howard Hughes. It's an interesting exercise to read/listen to both biographies simultaneously. I ordered the Carnegie book as a direct reaction to reading about Hughes - I find these massively successful people fascinating in their individuality.