Your book looks awesome! I just backed your kickstarter for a signed copy. No need to mail it though - I frequently drive up to KC to visit family and deliver farm goods.
Your
thread is already halfway there . . . Seems like you might not want to pay one of Paul's people to add a bit of flair, but we can have someone do it, if you want to fork over $200.
I would suggest that you first look over some of these possible avenues first, which will be cheap or free:
getting free or paid promotion:
https://permies.com/wiki/20020/Promoting-Stuff-Permies-FREE
thread boost:
https://permies.com/wiki/61482/Thread-Boost-feature
As well as some good info in the General Forum How-To's section:
https://permies.com/w/how-permies-works
Also, by replying to this thread, you'll get counsel (and eyeballs) from all kinds of people.
Finally, when your book is finished, you may want to consider putting it in our digital market (the digital and/or physical version).
Thanks, and heaps of good luck! Keep us posted . . .