For developers and code enthusiasts, R3 is offering free eBook downloads:
Corda for business
Getting started with Corda
Confidential computing with Conclave
These eBooks will educate you with information on R3’s platforms technology. Information is helpful for the certificates exams. To download the eBooks you must register by creating an account here.
If you have trouble downloading an item on their page or would like to request additional information, contact the Developer Relations Team at any of these support channels: R3 Developers Support