As usual, the full list behind the link.

 

 

I've actually read several of these, but I wouldn't say that 'everyone' necessarily has to read all of them. Some of them aren't much good, in my opinion. Then again, some are. It's certainly an interesting list.

Source: http://flavorwire.com/434548/50-essential-mystery-novels-that-everyone-should-read/view-all