First of all, there are many copies of such books, so it is more decent to give them away.
Secondly, if your leader likes history, he definitely needs these two books. If your leader only likes formality, these two books are definitely suitable for people who put 13 on the shelf and put on a decent look.
Of course, the premise is that your leader doesn't have two sets of books yet.
Finally, people who have always wanted to buy but are reluctant to buy drift by ~ ~