Since 1997, this translator's guide has been the worldwide leader in its field and has elicited high praise from some of the world's best translators. It has been fully updated in the 2006 edition.
While a little dated now, this is an excellent book to begin with if you are planning to get into translating as a job. It contains helpful hints, a list of resources, some of which are still valid, a history of the industry, and a number of funny translation slip-ups from around the world.