Thanks for the feedback, yeah there wasn't enough space to go through every single shape and I note that in the introduction to that chapter that I am going to go through the most common shapes in the MUFON and other reports, but for sure you're right there is probably/possibly barrel and many odd shapes and when one gets into subtleties you can have a poster of 60 shapes (&I've seen them)and still it doesn't cover every single sighting. But there are a group of the most commonly sighted ones.

Barrel-shaped is a good one though and I have a chapter on organizations and data archives in which I recommend people do searches according to shape.

I totally appreciate your feedback! Thanks for taking the time! I'll have to check out a search of Barrel shapes for sure.