A solid all-round text on photojournalism, with good sections on the photo story/photo essay and an excellent discussion of ethics. Some complain that it's insufficiently in-depth and not up-to-the-minute, or that it has scant coverage of specialties like sports photography, but these are the inevitable limitations of any general textbook. If there's any better overall photojournalism text, I haven't seen it.
Mine is the pre-digital 3rd edition, so not up to date.