You could try this one. I haven't read it, but I read another book full of quotes from writers giving advice on writing and Rhodes's quote is the only one that really stuck with me.
It's what he calls the Knickerbocker rule. In response to the question "how do you write?" the rule is: "apply butt to chair."
To me this rule says that writing is work. Hard work, and you need the attitude of a laborer if you really want progress as a writer.