Explain with reading is important.

git-svn-id: svn://svn.code.sf.net/p/crossfire/code/maps/trunk@17447 282e977c-c81d-0410-88c4-b93c2d0d6712

start/newbieshouse

@@ -10,7 +10,7 @@ enter_x 9
 enter_y 4
 msg
 Created:  2003-07-31 Tchize
-Modified: 2012-01-19 Rick Tanner
+Modified: 2012-03-11 Nicolas Weeger
 endmsg
 end
 arch dungeon_magic
@@ -3449,6 +3449,10 @@ You will find a lot of books in the Crossfire world.
 Some are so difficult your character may not understand them.
 Not everyone finds all books interesting, but one important fact is: Reading them often yields experience.
 Simply apply a book to read it.
+
+Reading is important for two reasons:
+- learning high-level spells requires a high literacy level, gained by reading a lot
+- texts contain various information about the world, including places that may be interesting to visit
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 endmsg
 x 11