So, in addition to teaching these people how to earn extra income from games that I already have some experience with (like Chainz Arena), I would also teach in the same book, how Yield Farm and Liquidity Pool work, what is decentralization, how to do staking, what factors cause a given currency to fluctuate, how to buy cryptocurrencies, how to withdraw and where to send certain tokens… Anyway…

I think its a bad idea to mix all of thta into the same book!
A big book seems more scary than I short one.
A smaller book would also be more specific in the topics to the person.

You could easily make a whole ebook about Splinterlands and other P2E games ^^

I would suggest sticking to what makes sense and just make more books.

E.g. Play2Earn games book. With only a few pages about how to withdraw the Dec or Hive to exchanges, very short.

Then next book you can talk about different Defi Projects (yield farm) via different crypto networks.

Third book - talk about decenrralization, staking, withdrawing coins and you can add snipbits to your other books where you mention splinterlands or some defi project an example (and free promo) :p

Thats what I would do.

Too much random information in a book isn't nesseecarily good :c