Life In 19x19

It is not suitable for a 21 kyu (I recommend it for EGF 13 kyu or stronger), and I do not think that a 21 kyu should already learn more than a handful of short josekis with up to 6 moves. A 21 kyu should rather strive to become 15 kyu as quickly as possible by learning basic reading and the most ...

Would you say this book is appropriate for a 21 kyu who is currently reading "Tesuji" from the Elementary Series and Kageyama's "Lessons In the Fundamentals?"