Fabulous choice of colors and font. The cover image is beautiful and unsettling, I love it.
The Adventure Overview section really sold me on the idea, I thought it was very well done. I thought the Hooks were all interesting but could be a bit more fleshed out. I liked the Dryads description and adding a stat block would be helpful to save GMs having a few steps.
The Strange Happenings table is great and so is the building sense of dread from Day 1 thru 3 (as noted in other comments the last part is missing). A few extra locations or possibly a dungeon to delve would be nice additions.