Westermann Commentary Introductions on Genesis Free

Westermann’s three volume commentary on Genesis is one of the best that I have ever used personally, though I have had to do so through libraries.  Google Books has the introductions to two of these commentaries for free in limited preview.  It is only for the first two volumes, but the introductions are fairly extensive.  Read the introductions HERE (Genesis 1-11) and HERE (Genesis 12-36).