According to the publisher's press release, Tour of Duty: John Kerry and the Vietnam War, by Douglas Brinkley, "was never intended as a political biography"--meaning, I suppose, that it is not meant to be confused with those ghost-written, election-year puffers and potboilers under whose weight the remainder-tables of America's bookstores are already beginning to buckle and break. Tour of Duty is intended to be a real book that makes an enduring contribution to the national letters--akin to the moving and beautifully written "Faith of My Fathers," by John McCain and Mark Salter, rather than "A Charge to Keep," by George...