I don't know whether you're talking about Levine's Jazz Piano Book or his Jazz Theory Book. If the latter, maybe check out David Berkman's Jazz Harmony and Berklee's Book of Jazz Harmony before making a decision.
Thanks for the reference to NewJazz. I wasn't aware of the channel and have now subscribed.
The theory book but like I said I am not touching this book now because it is very advanced. I don't think it's a good idea to read about Jazz harmony now. I just wanna learn the basics first