The Easy, Medium, and Hard of Star Battle? 

Today I'm trying a trio of Star Battles created by Jacob Cohen for his 'Puzzles for Progress' site. Check out Jacob's other puzzles--and help him buy mosquito nets for people in need--at tinyurl.com/puzzlesforprogress
And you can try today's Star Battle puzzles yourself at the following links:
Easier - tinyurl.com/pfp-58a-easier-o
Medium - tinyurl.com/pfp-58b-medium-o
Harder - tinyurl.com/pfp-58c-harder-o