Note - I have not listened to Kevin Brown speak. My review is entirely based on the content of the book
This book is an attempt in inspire others into working harder, caring more, and leading better throughout their life as a whole. The biggest problem from my perspective with this is the "always on, always perfect" mentality that seems to penetrate this book's core. The idea that you must be your best self 100% of the time is suffocating.
Have a bad day or difficult life event? Don't let it impact your work, otherwise you won't be a hero! Struggling with health? Don't let that get in the way of you smiling and serving as if you have no issues! Born with Autism? Kevin's son was able to overcome it and graduate highschool, so what's stopping you from being great?!
Kevin's "Hero Effect" could be inspiring, but so often the potential inspiration is lost for me when he delves into heavily ableist (and at times regressive) thinking. Other examples of ableism in the book are his mentor's battle with cancer (which his mentor attributed to slipping into bad habits and not being his best self) and his son's struggle with Autism, which I am repeating for a second time because it accounts for ~3-4 chapters of this small, ~120 page book printed at a 4th grade reading level.
There are some other strange patterns of thinking found within the book scattered between stories and equivocation fallacies which I can only explain as being appeals to emotion, because they certainly don't fit together logically. Even the idea of a "hero", the topic of the book is extremely poorly defined! At most I can surmise that the author believes a hero is any ordinary person who makes the choice to always be extraordinary, because being ordinary is a choice. There is no room for life circumstances, genetics, illness, or anything else to hold you back!
There are other little snippets about heroes buried in the text such as "heroes don't think about conditions" (which is a silly statement, because once you have assigned that condition to being a hero, you have already violated that rule).
At the end of the day, just read something else (unless you had to read this for work like I did). There are many more, much better put together inspirational leadership books out there that don't encourage ableism and don't set standards that even robots can't achieve.