Looking for logging into the Ibooks Store 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 Store site. After that you can login as usual with your login credentials.
https://www.apple.com/sg/apple-books/
https://itunesconnect.apple.com/
https://support.apple.com/en-us/HT201762
https://support.apple.com/ibooks
https://www.imore.com/how-restrict-access-itunes-app-store-and-ibooks-parental-controls-iphone-and-ipad
https://support.bookcreator.com/hc/en-us/articles/201908201-Publishing-to-the-iBooks-Store
https://www.tenorshare.com/ios-11/top-6-ways-to-fix-ios-11-ibooks-not-working-properly-on-iphone-ipad.html
http://www.google.com.sg/url?url=http://www.startribune.com/how-to-read-itunes-books-on-your-pc/160428925/
https://support.cdkeys.com/hc/en-gb/articles/203157692-How-to-Redeem-iTunes-Gift-Cards-
https://www.quora.com/How-do-you-transfer-an-iBook-from-an-iPad-to-another-iPad
https://www.idownloadblog.com/2015/12/07/how-to-disable-password-prompts-ibooks-store-mac/
https://apple.stackexchange.com/questions/298552/unable-to-login-with-apple-id-in-ibooks-author%3Frq%3D1
https://appletoolbox.com/apple-help-tips-and-tricks-support-index/ibooks-problems-resolve-ibooks-app-issues/