The author has an art book! (Multiple actually) https://www.amazon.co.jp/-/en/%E3%82%82%E3%81%AE%E4%B9%85%E4%BF%9D/dp/4046024321
The author has an art book! (Multiple actually) https://www.amazon.co.jp/-/en/%E3%82%82%E3%81%AE%E4%B9%85%E4%BF%9D/dp/4046024321