Has God Abandoned the House of Israel?

My book covers the biblical account of the history of the nation of Israel, beginning with the birth of their patriarch Abraham and continuing through their four-century stay in Egypt to the Exodus from Egypt and their formation of a formidable nation in the Land of the Covenant. It will cover their expulsions from that land and what happened to them after. A large portion of these Israelites are believed to be lost or have been completely annihilated by God or they have been assimilated in other cultures. This book will provide many biblical references that completely contradict these claims and that these so-called lost Israelites exist today.