訓 もと ・ 音 ホン
漢越音: bản
木 (tree) with an extra mark drawn right at the roots, pointing to the origin. From "root" come "origin", "main" and then "book".
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
図書館で本を読みます。 (としょかんでほんをよみます)
I read a book at the library.