SDD - Implementation

Question 1

Why do we use Books = [Book() for x in range (20)]
instead of
Titles = [counter] * 20
Author = [counter] * 20
Prices = [counter] * 20

Answer 1

Because in this instance we are using a record/class.
But primarily refer to it as a record.

Question 2

self.author

Answer 2

a record value