Thank you ashindnile for your reply.If you've got iCloud sync set up, even reading the book won't get you the New badge back.
I turned off Sync Collections and Sync Bookmarks and Notes settings of iBooks (These were the only settings I could find about syncing) and then deleted and re-downloaded a book that I have purchased from iBooks Store.You don't need to erase all your settings if you turn off iCloud sync and redownload.
Did it take you back to the page you were previously on?I turned off Sync Collections and Sync Bookmarks and Notes settings of iBooks (These were the only settings I could find about syncing) and then deleted and re-downloaded a book that I have purchased from iBooks Store.
Unfortunately, that did not bring back the New badge.
Yes. I believe iBooks also keeps a local data of where I was previously on.Did it take you back to the page you were previously on?