8AM March 6, 2009: Now with a sample site conversion.
10AM March 6, 2009: Fullscreen version added.

Original How to convert any website to a single PDF. Now with a sample site conversion. Fullscreen version added. Turns out I missed a step, sometimes. Turns out I missed several steps. Editable
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Here is a simple two step process to convert any site to pdf. Good for traveling or lack of internet. In my case, the original inspiration for this came from the Pyglet API docs. Pyglet offers an introductory pdf but limits the full api to html. Their server can be really spotty and disappears for days at a time. Trying to use their server is less fun than learning a new CLI trick.

I presume you're running some linux/bsd and have already installed wget as well as htmldoc.

Step one: wget the site

wget -nd -mk http://example.com

-nd flattens any directory structure
-m mirrors site
-k converts all internet links to local filesystem links

Step two: convert to pdf

htmldoc --webpage -f example.pdf example_path/toc.html example_path/*.html

--webpage glues many html documents together, inserting page breaks between each
-f names the output file

Optionally, to format the document for the computer screen, use --size 12x9in.

The default glob expansion puts the pages in alphabetical order. Explicitly mentioning the table of contents places it on the first page. There will be a second copy of the TOC in the glob, but it won't get in the way.

You'll have little control over the exact formatting and ordering of the sections. Htmldoc usually makes the formatting look pretty good. The page order does not matter too much because all the html links are preserved in the pdf. More importantly, it is electronically searchable.

And finally here is a complete, fully linked, offline, searchable PDF version of the Pyglet API Pyglet API in 8.5x11 paper format and formatted for computer screens