Here is the link to the one on the right
While I’m here, this is the Audible put together by the HPLHS. The TOC does not align with the books above but it’s the better version
do you mean arkham horror novelas ? or cthulu mythos works (from lovecraft, chambers,....) ?
the former I have no idea, the latter is usually easy to find cheap or even free to read, like this one:
you can also check r/Lovecraft for more mythos