You'll get all the PDFs we've released for Maskwitches to date:
The Corebook, The Meat Spoiler, To The Ice Caves, Making Maskwitches, The Burn, and the new GM's Companion.

These will be delivered to you via DrivethruRPG coupon after the campaign ends.

Please note it does not include the Pine Pitch Black PDF, since it is an alternate version of the corebook and we didn't want to force you to get that as part of the bundle.