When you say do you have a good readings on anxiety symptoms? Do you mean do I have any good books to recommend on anxiety symptoms that are available worldwide? Let me know if you're looking for something else.

Anxiety symptoms explained: Online course

A good resource would be the self-study, online course Master Your Public Speaking Fear. I'm the author of this course, and it explains the symptoms in detail with video animations so you can see exactly how fear works and how to control it. You can take it at anytime from anywhere (it works like a Netflix movie where you can watch it immediately). I don't know of another resource that really explains the symptoms. That's why I created the course - I couldn't find much that gave a good explanation with animations. I'm happy to chat with anyone who takes the course for free (by chat, email or phone) to answer any questions and help you apply the material to your situation.

Anxiety symptoms explained: Books

These books explain the symptoms:
▪︎ Books by Claire Weeks
▪︎ Your phobia: Understanding your fears through contextual therapy
▪︎ Triumph Over Fear: A Book of Help and Hope for People with Anxiety, Panic Attacks and Phobias
▪︎ Managing Social Anxiety: A Cognitive-Behavioral Therapy Approach
▪︎ The Essential Guide To Overcoming Social Anxiety And Public Speaking Fear (Includes Videos): Learn To Control Fear So It Doesn't Control You.