Plenty of good advice. I'll be sure to read and purchase it. I was somewhat mystified by the amount of conflicting advice from photographers on the Internet which didn't help. There was someone swearing by auto iso because it frees up time to concentrate on everything else Tbh I' ve had better success switching to manual and adjusting accordingly (at previous events) .
Auto-ISO is an absolute godsend when you are not using flashes. When you are using a flash or any external lighting then it is very different.
This isn't contradictory, just different tools for different jobs.