One of the most amazing things I have learned from TB is that most folks playing BG do not have a traditional music instruction background (scales, basic theory, notation reading, metronome use, etc.). I hope i said that in a polite way.
If you are writing a book, I guess you really need to be aware of your potential audience and their learning style. Which is way different from what I looked for several decades ago when i was learning walking bass.
And being cynical, including tab means you only have to provide half the material and save the rest for Volume II.
Make sure the book is printed in a format that makes it difficult to photocopy and never release a pdf copy.
And for Spin Doctor, I have to replace my 1994 Real Book with new, improved Hal Leonard 6th edition so I can be consistent with the mistakes my classmates are reading.
Now..back to the Russian Technical Regimen for fortepiano.