Located at No.33 Zhongguancun South Street, Haidian District, Beijing National Library is one of the largest libraries in China. Books and literature resources are rich, covering books in various fields. As far as I know, the specific location of chef's books in the library is as follows:

1. Collection scope: Beijing National Library has a rich collection of books covering various fields, including chef's books.

2. Location: The books of Beijing National Library are distributed on different floors, generally arranged according to the classification of books. Most chef's books will be classified as "housekeeping, leisure and tourism", and may also be classified as "catering, cooking, food science" and other related categories.

3. Retrieval method: If you need to find chef's books, you can use the online book retrieval system of the library or go to the reference desk of the library for consultation. Through the retrieval system or information desk, you can find out the specific location and collection number of chef's books.

In a word, Beijing National Library is rich in books, including chef books. The specific location can be inquired through the online book retrieval system or the information desk of the library.