We have just received a notification from ProQuest that the problems we were experiencing earlier are now largely resolved. The Ebook Central platform is now back, but you may still experience some issues with ProQuest Central.
You can also visit the ProQuest Status Page to check whether the platform you need is working yet.
Our apologies for the inconvenience this may have caused you. Thank you for your patience while this matter was resolved.
Lindsay Warwick , E-resources Team