The Alibi Library is an adventure – mystery story. If you like the mystery genre you might like to try out some of these online games:
Visit Shutter Island if you dare :
(you will need to be patient while the advert plays, but this is the only way to make the game free)
Or how about trying to defuse this bomb from a Hardy Boys adventure:
In this Covert Front adventure secret agent Kara must infiltrate the mansion of a notorious scientist, Karl von Toten, where she must discover the incredible secrets that lie within and escape with her life.
While your at the sites hosting the games have a look around -there might be something else you´d like.