LingQ's library?

Hi everyone,
I have a vital question that is consuming me ever since I started to create lessons for the library! :wink:
Which one is the right expression?

  • lessons for/in LingQ’s library
  • lessons for/in LingQ library
  • lessons in the library at LingQ
  • lessons in the library in LingQ

lessons in the library at LingQ
lessons in LingQ’s library

…are both OK.

You have created many lessons for the LingQ library. The library at LingQ is full of your lessons. Your lessons in the LingQ library are so interesting. LingQ´s library is richer because of your lessons!!!

Thank you Jamie and Sanne for your answers. It is definitely clear right now!