You be lost anyway, no matter the order you pick. With a few exception Innsmouth should be read before The thing on the doorstep. For the main mythos my preference is Dunwich, Call, and At The Mountains Of Madness. If you think the mythos is a bit much to tackle in one gulp try a one off like Herbert West Reanimator, The Rats In The Walls, and Facts Concerning the Late Arthur Jermyn and His Family. The shadow out of time is more a acquired taste.
from overview for madhi19 http://ift.tt/1CvbBKq