The Isis Adventure

Hello,

I pretty much know nothing about these puzzles but my boyfriend likes them and I'm looking at getting him one for his birthday. I found one for sale online which is the NK version but I don't know what this means. Is this still the normal puzzle or is it different in some way? I don't want to buy one and then it be wrong, somehow! Any help would be appreciated!

Thank you!

Hello Dumbo!
I could be wrong but it seems to me that the NK is only a Nkryptor-like which can contain a golden ticket. 1 in 10 contains a ticket rewarding the owner with a copernisis puzzle. But the CopernisisNK is not the copernisis puzzle. This is a good idea for a gift, nevertheless.