Question

You said to me ,"I took your book. I shall return it tomorrow. " change into indirect speech?
With reason for pronoun change ?

Answer 1

Answer:

you told me that you had taken my book you shall return it tomorrow

Answer 2

Answer:

You said to me ,"I took your book. I shall return it tomorrow. "

Indirect Speech:

You told me that you had taken my book and you should return it the next day.

In this sentence reported speech has 1 st person pronoun so that will change to the person of Subject of reporting speech.

So according to the this rule "I" will change to "you" and "your" to "my". And as the sentence is in simple past it will be converted into past perfect.