Words on Bathroom Walls by Julia Walton: review

I started this book with very high expectations after having read Just Our Luck.
The story is quite sad and I felt an impending sense of doom throughout the novel. There were also some facts and details about the main character's mental health situation that I found unbelievable.
I expected a very well researched account of the ups and downs in the life of a young boy with paranoid schizophrenia and I found out later that the author had just consulted two doctors but no actual people with this disease.
Since I am no expert in the matter, I searched online and found this enlightening video which although I must say is mainly about the film, gives very revealing explanations.
IMHO the most positive aspect of the novel is the fact that it makes readers see that people with this condition are just like people with any other medical condition, they struggle with the situation and try to do their best to get better.