SHORTLY AFTER THE BIRTH OF THEIR DAUGHTER KATIE, Steve and Stacy Trebing encountered every parent's worst nightmare: the discovery that their child had a devastating disease. Diagnosed with Diamond Blackfan anemia (DBA), a rare bone marrow affliction, Katie would have to bear a lifetime of monthly transfusions and daily injections unless she underwent a risky bone marrow transplant from a genetic match.

But even if the Trebings were willing to take that risk, how would they ever find the right donor? The only option seemed to be to have another child, one genetically chosen to be that perfect match.

Steve Trebing's emotional-and ultimately uplift ing-memoir describes what it was like to care for Katie, and to ultimately reach the decision to have another child, a savior sibling for their precious daughter.