It may be of interest to you to know that it's an illustrated Bible and dictionary, that appears to have been printed in the USA in the late 1800s. Besides containing a family tree that documents a few generation's of our family's births and deaths the book also illustrates many of the Bible stories in full colour - you know, with those typical Biblical drawings (source).
It's quite the family heirloom, don't you think? Fortunately, unlike Cain and Abel, my older brother and I won't be fighting over this one. :)