I've recently checked out this book from the library and I would rate this book a 2 star:
The reason I give it that rating is because this book looks like it was rushed to be published. Looking through the book you'll find a lot of mistakes and typos. For example on page 151 the word "out" is spelled as "ou t " some whole chapters are just filled with nonsense, in the chapter: "Advanced Tips And Tricks" everything listed is incorrect:
~If you put 2 weapons in your inventory and then press "1" and "2" you'll get a double weapon
~If you go near a VIP room then go into 1st person and walk towards it you'll go through the barrier and get teleported in
~If you type "brickmaster5643" while owning builders club you get an extra 400 robux
None of this is true I tried it all out for myself. Some of the facts in this book are also incorrect one saying that ROBLOX has a 45-minute time limit. Digging even deeper I found out that the "Advanced Tips And Tricks" section was not only wrong but directly copied from a PCGAMES post from 2012 (this book was written in 2019)! In conclusion I would not buy this book and wouldn't listen to the facts listed in it.
~Baxter Hoison, 2018 ROBLOX player