For Hong Kong books to give away, here are some suggestions:

1. Hong Kong history and culture: "A Brief History of Hong Kong Culture", "Hong Kong History", "Hong Kong Return and History" "Torture" and so on can allow the recipients to better understand the history and culture of Hong Kong.

2. Literary works: Classic Hong Kong novels such as "Love in a Fallen City" and "Days and Nights in Tin Shui Wai" can make recipients feel the unique charm of Hong Kong literature.

3. Hong Kong Food and Tourism: "Hong Kong Food Map", "Hong Kong Must Visit Attractions" and other guide books for recipients to travel in Hong Kong, helping them explore Hong Kong's food and tourist attractions.

4. Collection of books: "Hong Kong Documentary", "Hong Kong Artists Encyclopedia" and other art books can be used as collections to give to friends who are interested in Hong Kong art and culture.

5. Art and design: Books such as "Hong Kong Film Festival" and "Hong Kong Design Yearbook" are suitable for gifts to friends who are interested in movies and design.

Please note that there are different types of books to choose from as gifts depending on the interests and age group of the recipient.