Looking to read a collection of Wikipedia articles in one easy format? Wikipedia has a feature that lets you turn an article or collection of articles into an eBook.
The tool is called Book Creator and will export the articles that you select into a PDF or ODF eBook or even to order a print copy of the book. You can add pages and even entire categories to the book. Check it out: “If you are viewing a category page, you can add all the pages in that category at once. The Add this page to your book link will have changed into Add this category to your book. Click on this new link, and all the articles in that category will be added to your book. Relevant categories may be found at the very bottom of Wikipedia articles. Categories can also be added by hovering category links.”
Follow this link for step-by-step details on how to make one of these books.