I have two Apple IDs because I used MobileMe so as a result I have my old MobileMe Apple ID as my iCloud ID and I have my other original Apple ID as my Store account. So normally I use my iCloud ID for everything except the stores such as the iTunes Store and the iBooks Store. I want to be able to sync my iBooks over iCloud but since I am signed in as my Store Apple ID, when I try to sync iBooks with iCloud on my Mac, it says I am already using my iCloud ID for syncing and if I want to use my Store one (which I am currently signed in to iBooks with) instead. So how can I stay signed into the iBooks Store with my Store ID but still sync over iCloud with my iCloud ID?