I am almost finished with David McCullough's book about John Adams, which in my opinion is incredible. I was wondering if anyone can suggest a good Bio on George Washington?
McCullough's John Adams is great, one of my favorites. His book 1776 is also fantastic, which needless to say has a lot of George Washington but is far from a Bio. Since you're looking for a good G.W. bio though I would recommend reading His Excellency: George Washington by Ellis.
I really liked Ron Chernow's "Washington: A Life".
http://www.goodreads.com/book/show/8255917-washington
McCullough's Truman bio is awesome, BTW. I don't buy many books, preferring to read them for free from the library, but when I finished reading it, I went right out and bought a copy, just so I could have it on my shelf.