Among the people in Russia who share books in Life and Earth sciences for free there is very active person, who is an author of http://zoometod.narod.ru web-site (web-pages in Russian except book labels if they written in English)
Bulk of books are allocated at free file-exchange services for example, recently published amazing book "Solnhofen A Study In Mesozoic Paleontology" could be download using link: http://zoometod.ifolder.ru/9369255
it is Russian file-exchange system (English version is absent) so you should firstly touch hyperlink "сюда", afterwards chose any hyperlinks of advertisement sites and after 0.5 minute of waiting and (if your browser blocking pop-ups), push link "нажмите сюда", and at the new web-page type captcha numerals and push "Подтвердить" and when "Скачать" and downloading of archive-file with pdf will begin
