There is a scene in "The edge of heaven" movie ("Yaşamın kıyısında"), where son visits his old father and brings him a book. Then father asks him "What is this book about?" and son replies "Well, just read it (and you will see)". I think it goes like this in Turkish (if I heard it correctly):

- Konusu ne bu kitabında ? (or "kitabın da" ?)

- Aaa, oku işte.

Probably

- Al, oku işte (here it is, you can read it)

My first question: does it make sense in Turkish (in other words - did I hear and write it here correctly?)

If you heard it correctly, both of them can be meaningful.

And second question: how this sentence should be analysed?

Konusu ne bu kitabında ? -> (Lit.) What is the subject of this book in it?

What is the subject in this book of his (of a writer whose previous books they both know and read before)

or

Konusu ne bu kitabın da? -> (Lit.) What is the subject of this book (da) ?

If the second one is correct - what is the function of "da" in this sentence ?

Or "da" is an exclaimation here and then it should mean:

What is the subject of this book? (tell me)

"da" is used in Black Sea region mostly.

Ne diyorsun, da?

Ben bilmem, da.

etc.

- Konusu ne bu kitabında ? (or "kitabın da" ?)

- Aaa, oku işte.

Probably

Konusu ne bu kitabında ? -> (Lit.) What is the subject of this book in it?

What is the subject in this book of his (of a writer whose previous books they both know and read before)

If the second one is correct - what is the function of "da" in this sentence ?

Or "da" is an exclaimation here and then it should mean:

What is the subject of this book? (tell me)

"da" is used in Black Sea region mostly.