For some weird coincidence (or is it fate?) our Lovecraftian week actually coincides with the annual Chaosium.com sale. It has begun a few days ago and will end on May 1st.
You can get more information on the sale here. 30% off of all Chaosium products is quite a bargain. And if you are not sure Call of Cthulhu is the game for you, you can check out the CoC quickstart PDF, which is available for free from the Chaosium website. Enjoy!