3D Dental Books was a project I first started in 2015, when I discovered how to create three-dimensional models of teeth on the Apple ecosystem. Unlike books that have static images, my books had 3D animations that could be rotated and moved to assist in learning. For example, our books contain the access cavities of all teeth in 3D - allowing you to visualise the number, size and depth enabling you to apply this knowledge in clinical practice.
If you've been struggling with doing endodontics, I'd definitely recommend using this as a resource to improve your patient outcomes. The book also contains videos that detail a number of clinical tips I've learnt over the last few years that might be useful to you. And it's Free - so whats the risk?