This is the 2473rd most frequent Turkish word.
kitabı
"The book" (possessive or accusative form in Turkish).
Kitabı is the direct object of the verb 'gördüm' and is in the accusative case, indicating a specific book.
Kitabı masanın üzerinde gördüm.
I saw the book on the table.
Here, kitabı indicates the specific object of the desire 'isteyen' and is in the accusative case.
Kitabı almak isteyen çok kişi var.
There are many people who want to buy the book.
Kitabı is the object of the verb 'hediye ettim,' used in the accusative case, specifying which book was given.