pages 68-69, Example 3.1. The distances in the last line on page 68 should be 1, 2, 1, 2, 1. Then the end of the example on page 69 should read, "In this case keep the four closest elements. Three of these are 11, 18, and 23. The fourth could be either 15 or 19. Choosing the latter, to this add..."
pages 91-92, Example 4.1. The numerator of dis(D) should be 0.00864, and the value of dis(D) should be 0.444, or 4/9.
page 196, second sentence of second paragraph. Fallout should be defined as the proportion of nonrelevant documents that are retrieved, rather than those that are not retrieved.