I used to run books, and my clients were mostly company bosses and government agencies. General customers require hardcover, masterpieces, and must be atmospheric! If you show this story, it will definitely ruin the pot ... Hmm ... There are not many requirements. Here, I wish your father a prosperous business and rolling financial resources; Hehe … business is booming, so your father is very busy at work and won't have time to read like a brick. Besides, as a boss, everyone has his own set of management methods, others' may not be suitable for him ... and he is too lazy to read those useless things ... So the problem is only whether to put them ... not what books to put ... I suggest you go to the book building to adjust the thickest, most expensive and most famous books that can fill two bookcases quickly!