{Indexing Makes Your Book Perfect} {SHIKANO Keiichiro} {Most of you already know how to make books using \LaTeX\. And some of you might know how to make back-of-the-book indexes with \LaTeX\. However, are you ready to worry about how the index of your book should be? Or, if you have already gone through a trouble of writing or editing books, have you actually taken advantage of indexing in your work? The index, which would be inserted at the back of your book, is not just a reference list of words appearing in your book. Picking out keywords or chunks of text from your manuscript, then arranging them in another way---usually in alphabetical order, often complements your book. In other words, you can exploit indexing to make your book better! Through this tutorial, you will find what is required for good indexes, how indexing helps you and your readers, and some techniques in making back-of-the-book indexes with \LaTeX\. On top of that, in non-alphabetical languages, you cannot just make use of makeindex or xindy, mainly because these languages don't have any concept of alphabetical order. So, I will also go over actual cases of making back-of-the-book indexes in non-alphabetical languages.}