let a person have itとは 意味・読み方・使い方

That's correct. it's merely a book, so why not let the person who wants to read it the most have it?例文帳に追加

ええ 高が本一冊読みたい人間に持たせておくのが一番いいでしょう - 映画・海外ドラマ英語字幕翻訳辞書

Also, his behavior which looks as if he had let Ieyasu die without attempting to help him was not an act appropriate for a person who was an experienced warrior of the Oda family, and it was possible that this might have led to a problem for all of the Oda family if he had let the Tokugawa family become the enemy after Ieyasu's death, or if the number of allies had decreased.発音を聞く 例文帳に追加

また、同盟者である家康を見殺しにしたとも見えるこの行動は、織田家の宿将ともいえる人物の行いとしては適切とはいえず、家康が死んだ場合の徳川家が敵側へと回る可能性を上げたり、同盟する者を減らすなどの織田家全体に関わる問題に発展した可能性がある。 - Wikipedia日英京都関連文書対訳コーパス