I bought this artbook to scan, and it came with a bonus CD that has some drafts and design sketches for various illustrations included in the artbook (game art is left out for some reason). Unfortunately they're all low-resolution. I haven't scanned the book yet, but here's the CD as a preview.

◆目次
1_process------イラストの製作工程画像
2_rough--------未公開ラフ
3_monochrom----モノクロイラスト
4_preview------画集掲載イラストのプレビュー ※画集のイラストと異なる部分もあります。※ゲーム関連作品は入っておりません。
5_duelmasters--デュエル・マスターズのイラスト
6_bonus--------おまけデータ ※一部データサイズが大きいのでご注意ください。

Here's a flipthrough of the book.

https://www.youtube.com/watch?v=PXNjBH1n1TU

If you want to buy the book to support this awesome artist, here's the Amazon page. He has another artbook coming out in June.

https://www.amazon.co.jp/dp/4775315528/

I'll try to scan the actual book soon.

I heartily thank you. I hope you have a good day.

Base +5, EmbarrasedCat +5, CrossD +19

thank you so much! the artbook is beautiful.

Base +6