Puzzle 27: Heyawake 4

Fiddlier end of medium, I'd say.

Puzzle 26: Heyawake 3

This one is quite hard, in my humble opinion. The key is to consider the four central squares.

Puzzle 24: Heyawake 2

I think I am done with this grid (cf. Country Road 1 and Shimaguni 1) for now.

Small but Perfectly Formed 2: Heyawake 1

I've decided to call this a hard puzzle, as I don't think it can be solved without a bit of trial and error. If you disagree, let me know. I've never seen a 0-clue Heyawake before!