BlogBooker is a service that allows you to turn your the contents of your Blogger or WordPress blog into a PDF. Using BlogBooker is a fairly straight-forward process. BlogBooker walks you through each step of the process including the first step which is exporting the contents of your blog as an XML file.
The second step is entering the URL for your blog. After completing those two steps just sit back and wait as BlogBooker creates a PDF or Word file based on the text and images in your blog posts. The free version of BlogBooker limits you to three books and one year's worth of blog posts. There are upgrades available that will allow you to include more blog posts and will include higher resolution images.