Is this an English question ?<span />
Answer:
Hi!
Explanation:
Can I ask which book is this? I can't identify what you mean by "Crossover" and all the key-terms just from this question alone. :)
The authors purpose suggested by the text is explain how to use the guitar because it's not trying to convince you to buy a guitar and it isn't teaching you about all the parts on the guitar just how to tune the strings. Hope you found this helpful!
I can help! What’s your questions?