I also agree with Network Direction.
From a book standpoint: https://www.ciscopress.com/store/building-data-centers-with-vxlan-bgp-evpn-a-cisco-nx-9781587144677
Network times is also a great blog: https://nwktimes.blogspot.com/
He even has his own book: https://www.amazon.com/Virtual-Extensible-LAN-VXLAN-Practical-ebook/dp/B08HQCYDHJ/ref=sr_1_4?crid=3AP8LG7R9IZ7M&keywords=vxlan&qid=1649967750&sprefix=vxlan%2Caps%2C66&sr=8-4