Why is it that when I want to see the books of visual design guru Edward Tufte, I go to a page which shows only one book. (Very nicely, I admit) But with no way to navigate to any of his other books, except through an obscure list marked :

Book 1 | 2 | 3 | 4 | 5

floating in a non-standard / hard-to-hit location in the middle of the page?