Why can't I access the 'image' property in $user->book->image?

Question

Laravel

Hello. I don't understand why I can't access the image property:

{{ $user->book['image'] }} // дает результат
{{ $user->book->image }} // не работает и выдает исключение: 
//<i>"Trying to get property 'image' of non-object"</i>

The User model has an association with Book belongsTo :

public function book()
    {
        return $this->belongsTo(Book::class);
    }

The Book model has a relationship with User hasMany :

public function users()
    {
        return $this->hasMany(User::class);
    }

Answer 1

Image is a column in the books table? Please dump $user->book