This book ties into a presentation that I will be giving in May -- "How to Lead So They Want to Follow" It hinges on connection with your team and asking for feedback. Thank you for the lead!
My main thought is that this hinges on management. If you are already in a culture that is fear-based, candor is the last thing management wants. They hand out fear candy at the door and expect everyone to run to their cubicles.
IF, however, you have leverage at work by being in a leadership position, YOUR actions could change the entire dynamic / culture around you. You may find that people now seek you out for that radical candor.
I'm an analytical person, so I've had to work hard at figuring out ways to make feedback be genuine (true and trustworthy) and yet not stomping all over people. My best tip is always do this face to face because you will read their reaction on their face and/or in their body language. Also, you'll see right away (get feedback) how your words are impacting others. If you were misunderstood or their feelings were hurt, you should be on alert to see that and fix it.
SoP many times is looking for additional truth and communication from others -- or communicating truthfully about yourself (or hiding nervousness at an interview). This book seems to tie in well with that -- changing how we communicate, so we interact with others on a higher, more thoughtful level.
I plan to read this book now -- looking forward to it!