One of us is lying series reading order?

[Olaya]

Hey guys just wanted to ask a question,what order should I read the ‘one of us is lying’ series by Karen M.?

[Paige]

Hey! I would personally read them like this:
1) One of us is lying
2) One of us is next
3) Two can keep a secret
4) The cousins

I have only read the 1st one so far but i have heard that you should read the first 2 (OOUIL & OOUIN) in that order. The last 2 have a completely different story line so i believe you can read them whenever! Hope that helped!!