Harrison Wells isn't part of the comic world. He's unique to the TV adaptation. The show introduced him as a new element to the story, separate from the comic source material.
Sandra Cisneros' 'Mericans' often explores themes of cultural identity. The story shows the complex relationship between Mexican - American children and their heritage. The children in the story are in a sort of in - between state, not fully Mexican as per the traditional sense in Mexico, nor fully American in the mainstream American sense. They are creating their own unique identity which is a blend of both cultures.
One aspect of 'Mericans' is its exploration of cultural identity. The characters seem to be caught between different cultures, Mexican and American. For example, the children in the story have a foot in both worlds, with their Mexican heritage being a strong part of their lives but also being influenced by American culture all around them.
Another good novel from her list is 'Standoff'. It combines suspense and complex characters. The story keeps you on the edge of your seat as the plot unfolds and the characters' relationships develop. It's really a page - turner.