The correct answer is “from”.
The word “from” is used to indicate a difference between two things. In this case, the speaker is saying that their book is different from the listener’s book.
The word “than” is used to compare two things. In this case, the speaker could have said “My book is better than yours” or “My book is worse than yours”. However, the speaker is not making a comparison, they are simply stating that their book is different.
The word “with” is used to indicate a connection between two things. In this case, the speaker could have said “My book is with yours” or “My book is not with yours”. However, the speaker is not saying that their book is connected to the listener’s book, they are simply saying that it is different.
The word “by” is used to indicate a cause or reason. In this case, the speaker could have said “My book is different by design” or “My book is different by accident”. However, the speaker is not saying that their book is different because of something, they are simply saying that it is different.