You can try this several times and see if it works. You can simply apply this trick to solve the problem. This method is applied for a scenario where users have their collections of books but inside those folders/files, they are all empty. Method 2: Resetting User Interface of iBooks
In the General tab, check the box ‘ Sync bookmarks, highlight, and collection across devices‘ option.Click on iBooks in the menu bar at the top and choose the Preferences option.You can also check synchronization settings on macOS, open the iBooks application on macOS.Scroll down and you will find two options named ‘ Sync Bookmarks and Notes‘ and ‘ Sync Collections‘, turn them ON so that all activities will be synced.Go to your phone Settings, then tap on iBooks and confirm whether it is ON or not.You can compare your settings with the ones in the below steps: We will show settings for both devices where you can set options for synchronization. The first and important step is to check if your settings are correct for the synchronization of iBooks. Method 1: Checking Your Synchronization Settings We will start from the most common and simple method to the detailed one. This article will help you with different methods to resolve the issue. If this scenario is applicable, you can resolve the issue by reinstalling the application from the app store. Corrupt Application: if the application you’re using is corrupt or not working properly.
Several users finding themselves in a similar situation have reported that they managed to resolve the issue by refreshing the iBooks content which can clear out the cache. The user interface is glitched – Another potential case in which this issue occurs is when the User interface of iBooks application is glitched.You need to enable the synchronization for both devices to synchronize books. Synchronization is disabled – In some cases, settings for synchronization can be responsible for this particular error.Alternately, click the icon for your device in the iTunes app, then click the Sync button. You can now sync your device wirelessly by connecting it to a charger and plugging it into an electrical outlet. If you click Eject, the icon for the device is removed, but Wi-Fi syncing remains turned on. When you disconnect your iPhone or iPad from your computer, the icon for your device will remain in iTunes unless you click the Eject button. Select the checkbox for Sync with this over Wi-Fi.Click the iPhone button near the top-left of the iTunes window.Connect your iPhone or iPad to your computer using a compatible USB charging cable (see above).
How to Enable iPhone and iPad Wi-Fi Syncing If your iPhone or iPad came with a USB-C Charge Cable and your computer has a USB port, use a USB-C to USB Adapter and a USB-A cable. If your iPhone or iPad came with a USB-C to Lightning Cable and your computer has a USB port, you'll need to use a Lightning to USB Cable ( sold separately). If your iPhone or iPad came with a Lightning to USB Cable and your computer has a USB-C port, you'll need to connect the USB end of the cable to a USB-C to USB Adapter ( sold separately), or use a USB-C to Lightning Cable ( sold separately).
To enable syncing over Wi-Fi, you'll first need to connect your iPhone or iPad to your Windows PC using a cable. But if you disconnect the device's cable from the computer while syncing, syncing will stop, even if Wi-Fi syncing is on. Note that if you connect an iPhone or iPad to your Windows PC while the device is syncing over Wi-Fi, the syncing process will continue over the cable. You can sync your iPhone or iPad to a Windows PC by physically connecting them, but did you know that you can sync your Apple device by having them connected over same Wi-Fi network? The only real difference to the operation is that syncing over Wi-Fi is slower than syncing over a cable.
When you connect your iPhone or iPad to a Windows PC, you'll be able to sync to it albums, songs, playlists, movies, TV shows, podcasts, books, audiobooks, photos and videos, contacts and calendars.