Philipp Posts on the Official Google Blog
Here’s what I found to be the most interesting part:
The book is self-published with Lulu.com, an interesting service. Basically, Lulu allows you to upload your Microsoft Word or OpenOffice Writer file along with your cover, and then convert it to a print-on-demand book. If you pay a little extra, your book will also appear on Amazon. The process ain’t free of headaches but I gotta say, it’s worth it. Lulu will also make sure the book’s findable through Google Book Search.
I’ve thought about writing a book, and this looks like a very good way to do it. With modern technology, the only thing really holding you back from being an author is writing the book itself. Publishing and marketing are readily available to individuals and small content creators, thanks to services like Lulu, Google Books, search, and AdWords. Try it out.