The RadBook does not expose CurrentItem or Selecteditem property. Instead you use the RightPageIndex
property, you can programmatically detect that it has changed by using the PageChanged event. Please let us know if this helps you.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items