It sure is. The story in 'From Scratch' is drawn from true experiences and has been adapted for the screen or page. The characters and plotlines have roots in reality.
Well, 'From Scratch' is not a true story. It might draw inspiration from various sources but was created with imagination and creative writing rather than being based on real events or people.
It depends. Sometimes books labeled as such incorporate elements of real events but also have fictionalized parts. So, it's not always a straightforward yes or no.