Purchasers of Joe’s book receive a 15% discount on Script Debugger 6 (along with discounts on other fine Mac software). This means you effectively get Joe’s book for free.
I just looked through my copy. There are a couple of mentions of AS/ASObjC but no specific examples using it that I found. There is a short paragraph that advises going to https://macosxautomation.com/applescript/apps/ to learn more about AS/ASObjC.
After rereading Jean’s question I realized that I may have misunderstood the question when I first replied. I initially thought Jean was interested only in AppleScript Objective C but see now that he may have been interested in AppleScript and/or AppleScript Objective C. The book does in fact have a chapter titled “Get Started with AppleScript” that includes AppleScript basics as well as some example scripts. There is a section titled “Learn More about AppleScript” in the chapter with links to resources for learning more about AppleScript. Sorry if I misunderstood Jean’s question when I first replied.