After weeks of hype and days of leaks, readers got a chance to judge Prince Harry's memoir, Spare, for themselves when it went on sale around the world on Tuesday, Jan. 10. The book was billed by its publisher Penguin Random House as an account told with "raw, unflinching honesty" and filled with "insight, revelation, self-examination and hard-won wisdom about the eternal power of love over grief." The memoir's title is an apparent reference to Prince Harry's being a royal "spare," not the first in line to succession. William, Prince of Wales, is next in line. The 416-page book was...