CISCO ISE Training and Labs

Hello!

I'm on a quest for additional resources about CISCO ISE. I've gotten a little collection of ISE training and practice material. But I'd just like to know what everyone is using to practice, read up on and/or lab up CISCO ISE. GNS3 has resources which I've downloaded. Just wanna see if there's any hidden gems out there (books, labs, anything) that are musts that I have missed. Thanks!