iBooks books not available offline and have to re-download my books from iCloud every few days.
I am logged into my id with 2 iPhones and 1 Macbook pro and iBooks are all synced with iCloud. Every few days it happens that I have the book I am reading and every other book in my library is not downloaded and it asks to me to download again from iCloud. It would have been fine, but I travel often on the tube these days and its annoying to open the iBooks just to see I can't read anything till I get internet.
Any setting I should change to keep the books always available on the device?
iPhone 6 Plus, iOS 11.0.1