Level Up! is a Baduk (Go) series for beginners. They have been written, edited and translated by graduated students from Department of Baduk Studies, Myongji University. The author Lee Jae-Hwan is the owner of a Go school and has about 16 years teaching experience.
In Korea these books are used as workbook in many private Go schools, one chapter is studied per lesson. Children from as young as 5 years old can learn Go easily with these books.
An excellent book on Joseki and good for all levels!
Answer sheet available online in PDF format here at Baduktopia