ترجمة - انجليزي-عربي - many books have an increased price because of...

Hi Maroki
You can't translate "bells and whistles" as "الأجراس و الصافرات"
It is an idiom used to indicate 1)unnecessary features 2)the activities held to make something
sound exciting and interesting.
In our case, it is the second.
So, kindly edit your text with the right meaning.