I only got stumbled across the Blackwell series recently. After playing the first one I was hooked and had to get them all. They follow the females of the Blackwell family, who all gain Joey as their spirit guide and work together to free spirits trapped here. In order to free a spirit, you must help it realise that it is dead, and come to terms with it. However, things get especially interesting when the overarching story across the series kicks in, and it will keep you enthralled. The cliffhangers/revelations at the end of each game will have you desperate for the next one. There are no obtuse puzzles in the series either, and no real pixel hunting. You always feel like you can progress with each new bit of info that you get. Joey also becomes a playable character as the series goes on and allows you to go through locked doors to look around etc... The games are easily among the best point and clicks out there, on par or surpassing the likes of monkey island. Definitely recommend them!
