Mrs. Bethany claims that they let humans in evernight to create a new learning experience for the students in the first book.
that is the only answer you get in the book evernight (first of the saga), and i may not be the best of help because i have only read the first book and am starting the second tonight, but anyway, i think there is a darker, "secret" reason why she let humans in that you will find out later in the saga.
The ISBN of Evernight - novel - is 9780061284441.
Evernight - album - was created in 2007.
Evernight Games was created in 2000.
The ISBN of The Battle of Evernight is 0333907574.
Evernight - novel - has 336 pages.
The Battle of Evernight has 480 pages.
Evernight - novel - was created on 2008-05-27.
The Battle of Evernight was created on 2003-08-01.
Most of the series is placed in the school, Evernight Academy.
1) Evernight 2) Stargazer 3) Hourglass 4) Afterlife :)
the 4th evernight book is called afterlife and its coming out in march 2011
There is a site full of free e books including Evernight called onread.com