Could be an older copy of either Better Homes & Gardens, Good Housekeeping or Betty Crocker.
I would check some of the recipes in your book against those in past copies of the above three books. You might have to enlist the help of a friend who might possibly have either or both books or do some investigating at the library. Then, of course, there's good old Google.
Certainly appears that the book has been "loved" by your family. Don't you wish it could talk? If for no other reason than to tell you it's identity.