А разве и этого гугл не знает?

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mayton,

Вообще-то можно и так:
Follow the below steps:
Open your Internet Explorer (Not Firefox). Make sure that you are the admin of your computer. Then, go to the page in books.google.com that you want to download.
Now, go to “C:\Documents and Settings\%admin_name%\Local Settings\Temporary Internet Files\” of your computer. Delete all of the content of that folder.
In your Internet Explorer, refresh the page and browse-through the pages of the books that you want to download.
Refresh the “Temporary Internet Files” folder. Copy all PNG files to another folder. You can distinguish PNG Files through its icon.

Сейчас пробую GBD что-то скачать:

Кстати, тут обьяснили как можно качать из юниксов, потом осталось только переконвертировать в PDF:
авторFor Linux, you could use curl to download images that have the following format:

http://books.google.com/books?id= BOOK_ID &pg=PA[1-NUMBER_OF_PAGES]&img=1&zoom=3&sig=SIGNATURE&w=1000

BOOK_ID can be obtain directly from Book Search, while SIGNATURE can be obtained from the source code (search for &sig=).

Example:
curl http://books.google.com/books?id=id_of_the_book&pg=PA[1-300]&img=1&zoom=3&sig=signature_of_the_book&w=1000 -o "booktitle-#1.png"


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