Korea:

My First Book of Korean Words: An ABC Rhyming Book by Henry J. Amen IV and Kyubyong Park
The Name Jar by Yangsook Choi
The Korean Cinderella by Shirley Climo
Never Trust a Tiger: A Story From Korea by Lari Don
The Rabbit’s Tail by Suzanne Crowder Han – The story is well written and would be funny to read aloud, but the illustrations could be scary for children under
eight years old.
Father’s Rubber Shoes by Yumi Heo – Heo is Korean – He has written and illustrated dozens of books, but not all are set in or about Korea.  
Lady Hahn and her Seven Friends by Yumi Heo
The Legend of Hong Kil Dong: The Robin Hood of Korea by Anne Sibley O-Brien – a graphic novel for children ages eight and up 
Dear Juno by Soyung Pak
The Firekeepers’s Son by Linda Sue Park
Bee-Bim Bop by Linda Sue Park
The Have a Good Day Café by Francis Park and Ginger Park
My Freedom Trip: A Child’s Escape from North Korea by Francis Park and Ginger Park 
My Name is Yoon by Helen Recorvits
Sixteen Years in Sixteen Seconds: The Sammy Lee Story by Paula Yoo