Geeksforgeeks as Books

Books

To get the latest version of the books, see the latest release.

They are also in the goodies directory. Each book under geeksforgeeks-books is generated with articles under a tag/category on geeksforgeeks.org. The book under leetcode-book is generated from the articles on leetcode.com.

Here's how the books look like in the iBooks App and Kindle App on my iPad. Kindle hasn't been tested.

Book covers are made of word clouds based on the book content using word_cloud

Tools

If you want to generate books yourself. Here is an incomplete guide.

Requirements

1. install Scrapy. It's is used to download webpages from geeksforgeeks and leetcode. It follows the next page link and downloads webpages.

   Install it with pip install scrapy. I created two separate scrapy projects called geeksforgeeks and leetcode to download wepages from the sites.

2. lxml and Boilerpipy (or BeautifulSoup). After downloading the html files, you need to extract the articles from them, I'm using Boilerpipy because it can handle webpages with different layout. But if you are only interested in the geeksforgeeks site, you can just use lxml to extract the articles. It will probably be faster too.

   Boilerpipy also removes the title of an article sometimes. So I had to do some post-processing with lxml after to add the title back.

3. Pandoc. It's used to convert html files or markdown files to epub, pdf and docx format files. The latex engine used in Pandoc can't handle gif images so only a few pdf books have been generated so far.

4. kindlegen is needed to generate mobi files for reading on Kindle or the Kindle App.

5. WordCloud. The book covers are generated with wordcloud with a bit of meta in mind.

How To

1. Crawling with Scrpay. Go to the geeksforgeeks subdirectory and run commands like scrapy crawl geeksforgeeks -a category=category -a name=name.

   For example, running scrapy crawl geeksforgeeks -a category=tag -a name=pattern-searching will crawl from the page http://www.geeksforgeeks.org/tag/pattern-searching/. category and name are two arguments the spider takes. On geeksforgeeks, things can be organized by tag or category. Specify the category/tag and the name, Scrapy will do the rest for you.

2. Generate a book. Now go into the geeksforgeeks-books subdirectory and you should be able to find a directory called pattern-searching. Now run python generate_book.py pattern-searching 1.0. It will clean the html files, concatenate the cleaned files into one html file, then use pandoc to create an epub and pdf format files from the it. In the end a mobi file is created using kindlegen.

To Do

Style the books

Style the books better. Those books are essentially styled via css. Therefore styling <pre> and <code>, for instance, will style the code of the epub books.

Generate pdf format books

Convert gif images to png and use them so pandoc can handle them.

Contribute

Book

Every tag or category on geeksforgeeks.org can be turned into a book. So you are welcome to add/suggest more books.

Style

The style for generating epub books is under styles subdirectory. epub books are styled via css. Welcome to submit your stylesheets.

License

The content in the books doesn't belong to me. I created the books so other people and me can read them offline on iPad or Kindle, and (hopefully) for a better reading experience.

The content on geeksforgeeks.org is licensed under Creative Commons Attribution-NonCommercial-NoDerivs 2.5 India. See the license here.

The content on leetcode belongs to the site.

The code in this project is licensed under Apache License, Version 2.0. See the license here.

Random Reading Site

If you are interested in reading some random posts from geeksforgeeks.org to have something to think about when feeling bored, head to gfgreader.info.

Authors

Jing Zhou, gnijuohz at gmail.com.