: Most tools are free and maintained by a community of contributors.
: If a book is out of copyright, these tools can usually grab every page.
: A node-webkit application that uses the Viewer API to save each page of a Google book as a PNG. Official Export Methods
provide JavaScript snippets that users paste directly into their browser’s developer console to aggregate and download page links into a single zip file. Interoperability and Accessibility
: If Google only shows you 20% of a book, a downloader can only save that same 20%. They cannot "unlock" pages that Google hasn't made visible. Is it Safe and Legal?