This is a fairly decent introduction to the topic<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=mioR_WrkRaU" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=mioR_WrkRaU</a><p>This book is also doing the rounds but I&#x27;m not sure how good it actually is<p><a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;Brain-Maker-Microbes-Protect-Brain%C2%96&#x2F;dp&#x2F;0316380105&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;Brain-Maker-Microbes-Protect-Brain%C2%...</a>