This is the 329th most frequent Croatian word.
ti
"You" (informal, singular).
In this case, 'ti' is again a dative pronoun, indicating the person to whom the book will be shown. Its context as the indirect object is central to the meaning of the sentence.
Pokazat ću ti knjigu.
I will show you the book.
In this sentence, 'ti' serves as the subject pronoun 'you' used for addressing someone in a friendly or familiar way.
Ti si moj najbolji prijatelj.
You are my best friend.
Here, 'ti' is a dative pronoun meaning 'to you,' used to indicate the indirect object in the sentence.