Ten Days and Nine Nights: An Adoption Story by Yumi Heo

From chapters.ca:
Follow a little girl as she and her family prepare for the new baby that will soon be joining them. And simultaneously, watch the girl's mother fly off to Korea, meet the new baby, and bring her home. Here is an utterly simple, sweet, and child- centric look at the adoption process through the eyes of a soon- to- be older sibling. From cutting a red paper heart and taping it above the new baby's crib to telling her best friend about the adoption, the young narrator counts down every day and night with growing anticipation, marking them with a big X on her calendar. Unlike other adoption books which are aimed only at the adoptive child, Ten Days and Nine Nights is also perfect for older children who are about to become big sisters and brothers.