The poison of love or love poison (ing)

Through the diaries and 4 teenage texting, Eric Emmanuel Schmitt tells us the existence of Colombe, Julia, Anouchka and Raphaelle, various topics are covered in this novel: The love of course but also the relationships to others, today's youth and his calls for help ...
I was particularly challenged in this novel: the ability of the author to slip into the skin of his characters, girls here 16 years ...