Way of a peaceful warrior is a must. book definitely makes you think of all the things you do on a daily basis and just generally how you live you life.
Gary Paulsen books are incredible, like everything written by him.
Louis Lamour books are a good novel to read, but once you read one you've pretty much read all of them.
for dragons and mythology i'd have to say the eragon series, really creative and fantastical but it is a teen book.
check out James Rollins books, that author will keep you turning pages long into the night.
i would suggest harry potter books but come on, who hasn't read them?