Creating an index is a complex task bearing elements of mathematics and semantics. An index is a useful tool for readers to access specific and relevant information in a text. Like an excellent sense of directions, an index should provide just the right information in an easily accessible style.
When I work on an index, I strive to create a product that is germane to the text bearing in mind the different uses to which a book may be put. Both the price and length of time required to create an index are variable, so if you have a project, send the following information for a quote:
Examples of indices:
The Children's Book Business: Lessons from the Long Eighteenth Century Lissa Paul, Routledge
In the above link, click on index in the "Look Inside" window.
Keywords in Children's Literature edited by Philip K. Nel and Lissa Paul, NYU Press