monkie2 said:
1) デジタルツールで描く！サラリーマンの描き方
Draw with digital tools! How to draw a salaryman

https://www.amazon.co.jp/デジタルツールで描く！サラリーマンの描き方-レミック-ebook/dp/B07S71JX44

Dl link:
https://www.mediafire.com/file/9mdvfomaoraxr70/%255B%25E3%2583%25AC%25E3%2583%259F%25E3%2583%2583%25E3%2582%25AF%255D_%25E3%2583%2587%25E3%2582%25B8%25E3%2582%25BF%25E3%2583%25AB%25E3%2583%2584%25E3%2583%25BC%25E3%2583%25AB%25E3%2581%25A7%25E6%258F%258F%25E3%2581%258F%25EF%25BC%2581%25E3%2582%25B5%25E3%2583%25A9%25E3%2583%25AA%25E3%2583%25BC%25E3%2583%259E%25E3%2583%25B3%25E3%2581%25AE%25E6%258F%258F%25E3%2581%258D%25E6%2596%25B9.rar/file

2) どんなポーズも描けるようになる！ マンガキャラアタリ練習帳
You will be able to draw any pose! Manga Character Practice Book

https://www.amazon.co.jp/どんなポーズも描けるようになる-マンガキャラアタリ練習帳-西東社編集部/dp/4791627970

Dl link:
https://www.mediafire.com/file/9oiatd71ekafq66/%25E3%2581%25A8%25E3%2582%2599%25E3%2582%2593%25E3%2581%25AA%25E3%2583%259B%25E3%2582%259A%25E3%2583%25BC%25E3%2582%25B9%25E3%2582%2599%25E3%2582%2582%25E6%258F%258F%25E3%2581%2591%25E3%2582%258B%25E3%2582%2588%25E3%2581%2586%25E3%2581%25AB%25E3%2581%25AA%25E3%2582%258B%25EF%25BC%2581_%25E3%2583%259E%25E3%2583%25B3%25E3%2582%25AB%25E3%2582%2599%25E3%2582%25AD%25E3%2583%25A3%25E3%2583%25A9%25E3%2582%25A2%25E3%2582%25BF%25E3%2583%25AA%25E7%25B7%25B4%25E7%25BF%2592%25E5%25B8%25B3.pdf/file

3) プロ絵師の作法 キャラクター・ポーズ・構図で魅せるイラスト上達テクニック

Professional painter's manners Character, pose, composition to attract illustration technique

https://www.amazon.co.jp/プロ絵師の作法-キャラクター・ポーズ・構図で魅せるイラスト上達テクニック-サイドランチ/dp/4844363646

Dl link:
https://www.mediafire.com/file/5k5ri09vncjdwu0/%25E3%2583%2597%25E3%2583%25AD%25E7%25B5%25B5%25E5%25B8%25AB%25E3%2581%25AE%25E4%25BD%259C%25E6%25B3%2595_%25E3%2582%25AD%25E3%2583%25A3%25E3%2583%25A9%25E3%2582%25AF%25E3%2582%25BF%25E3%2583%25BC%25E3%2583%25BB%25E3%2583%259D%25E3%2583%25BC%25E3%2582%25BA%25E3%2583%25BB%25E6%25A7%258B%25E5%259B%25B3%25E3%2581%25A7%25E9%25AD%2585%25E3%2581%259B%25E3%2582%258B%25E3%2582%25A4%25E3%2583%25A9%25E3%2582%25B9%25E3%2583%2588%25E4%25B8%258A%25E9%2581%2594%25E3%2583%2586%25E3%2582%25AF%25E3%2583%258B%25E3%2583%2583%25E3%2582%25AF.rar/file

I am trying to share what I have found useful and believe isn't on this thread, I could be wrong though.