Should of posted this in the Anime area which is in this entertainment area but look at one more tab I will help you out.

Here is the Anime and Manga Area

http://www.graalians.com/forums/forumdisplay.php?f=53

and with every every thing that has a book it will be better to read it if you want to know more back story or what was missed in the shows or movies.

So I would say if you are really into Soul Eaters go ahead and read them