Looking for logging into the Ibooks site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Ibooks site. After that you can login as usual with your login credentials.
https://www.apple.com/ru/apple-books/
https://support.apple.com/ru-ru/HT201762
https://itunesconnect.apple.com/
https://discussions.apple.com/thread/4684332
https://apple.stackexchange.com/questions/330027/ibooks-store-how-do-i-know-what-format-is-used
https://docs.jamf.com/10.9.0/jamf-pro/administrator-guide/Books_Available_in_the_iBooks_Store.html
https://www.imore.com/how-restrict-access-itunes-app-store-and-ibooks-parental-controls-iphone-and-ipad
http://www.blurb.com/apple-ibooks-store
https://en.wikipedia.org/wiki/Apple_Books
https://macreports.com/how-to-cancel-your-itunes-apps-itunes-store-ibooks-etc-purchases/
https://appletoolbox.com/apple-help-tips-and-tricks-support-index/ibooks-problems-resolve-ibooks-app-issues/
http://www.awsp.org/member-support/leadership-framework_1/user's-guide/user's-guide-for-ibooks-store-faqs
https://www.bookshare.org/cms/help-center/can-i-open-book-ibooks