I read Ivana Brutenic's book "The Magic of Employee Influence" and I found the book really insightful about employee ambassadors on LinkedIn. The book is full of practical tips and every business owner should read it. It makes your recruitment and sales processes more easy and successful. The book is based on real life business cases by international companies.
It's simple to get an overview of each chapter with the pro tips, summary and action tips.
I had Ivana speaking on my LinkedIn live about employee advocacy and she is a great public speaker who inspires listers with her enthusiasm and wit. She had great answers to the questions from the audience.
I recommend working with her and her sister who both have PhD's.