An HTML.it guide downloader. It saves guides in .md file, then you can easily convert the files to pdf format.
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run file HitGuideDownloader.py
python HitGuideDownloader.py -
copy and paste the guide index link, for example the page http://www.html.it/guide/guida-nodejs/
At the end of the processing, the result is placed in a subdir of the project directory, named as the guide title.