There is nothing you can do except making use of a comprehensive repair program to figure out the iBooks not working trouble when all the above methods cut no ice with it. After comparing several competitive iOS system recovery tools, it is decided to introduce the cost-effective one - Joyoshare UltFix iOS System Recovery to you. Being an excellent repair program, it is nothing difficult for it to fix various issues on iPhone/iPad/iPod touch and Apple TVs.
Moreover, the great strong point of Joyoshare UltFix is the two modes coming with it. For iBooks apps not working and other common problems like iMessage not working on iPhone, you just need to choose the standard mode to serve you. What features this mode is that it causes no data loss throughout the process. What about the advanced mode? The repair mode is specially applied to solve the problems that can not be worked with standard mode. Basically, all kinds of ordinary iOS issues could be settled hands down.
Key Features of Joyoshare UltFix iOS System Recovery:
Repair iBooks not working without losing data
Let your iOS device enter/exit recovery mode for free
Compatible with every iOS device and the latest iOS version
Offer standard mode and advanced to fix numerous iOS issues