User Manual

[Aerofly]

Clutching at straws here, but you could try signing out of your Apple ID and back on again, just in case it’s got screwed up somewhere!
Failing that have you tried an iPad reset?

 

[twerppoet]

Also possible, but not likely, your router is blocking the iBook store. If you have another iOS device, check to see if you can access the store. Restarting your router isn’t a bad idea either.

 

[LannyC]

Clutching at straws here, but you could try signing out of your Apple ID and back on again, just in case it’s got screwed up somewhere!
Failing that have you tried an iPad reset?

Nope, already tried both of those. Thanks.

 

[Aerofly]

Well that’s me out of ideas I’m afraid, I reckon your next port of call is the Apple Store.
Good luck, hope you get an answer.

 

[LannyC]

Also possible, but not likely, your router is blocking the iBook store. If you have another iOS device, check to see if you can access the store. Restarting your router isn’t a bad idea either.

It works on my wife's Mini 4, which is still running iOS 11. I made the apparent mistake of updating to 12.0.1.

 

[twerppoet]

It works on my wife's Mini 4, which is still running iOS 11. I made the apparent mistake of updating to 12.0.1.

Just plane weird.

There is a minor update, iOS 12.0.1 available. You might give it a try and see if it kicks things back into alignment.

Other than that, I agree Aerofly, you should contact the App Store support. Unlike Apple’s device support, it’s free. Apple is very helpful when it comes to problems that prevent you from spending money.

Here’s Apple’s support page for not being able to connect to the iBooks Store. Might be worth running through it. One interesting thing mentioned is making sure the iPad’s date and time are set correctly for your time zone.

If you can't connect to the App Store, iTunes Store, or Apple Books

At the end of the page there is a contact link.

Good luck.