Alot of the content I already have read in there zzap 64 magazine. I'm not sure how much of the content is new for the book.
I also think the a5 format is good most of the time. But if they ever post a picture out of old zzap 64 issues you can't read them due to how small the print is. So you're probably better off buying the larger version.
The content is great and I really enjoy the zzap 64 magazine so I hate to be as negative as I have been.
If you don't have any issues then this is great. If you do collect the issues then you probably have read this content already.