What are the main themes explored in the book Mandíbula and Historia de la leche?

I- Mandíbula explores disturbing and unsettling themes such as fear, revenge, sexuality, and family ties.
II- Historia de la leche mixes different forms and rhythms, subverts conventions, and pursues a poetry that leaves a mark by seeking its own paths.
III- Historia de la leche explores themes such as death, truth, and the will to do harm.
IV- Both books explore the theme of family ties and the search for one's own identity.