1. Bring me a book in the top drawer.

[There are some books in the top drawer. Bring me one book among them.]

2. Bring me the book in the top drawer.
[There is only one book in the drawer. Bring me the book.]

3. Bring me books in the top drawer.
[There are many/several books in the top drawer. Bring some books to me.]

4. Bring me the books in the top drawer.
[Bring me all the books in the top drawer.]
----------------------------------------------------
Thank you for your help. Would you let me know whether the sentences and their explanations are correct? Correct errors if any, please.

All seem correctly explained, yes.