Re: 0.5 BTC reward - smart enough to tell me what is wrong with this book cover?
it has to do if i'm not mistaken, with the initial letter of Antonopolous, his name
The OP wrote the author name wrong but it is correct on the ebook cover"Mastering Bitcoin" by Andreas Antonopolous
The only wrong thing that I found is you are writing Mr Antonopoulos name wrong 