Books author - "I. V. Novoa and K. M."

Two girls are from the U.S. They never met until they both went with their families to Europe. They get lost and become orphans and are adopted by scientist. They are taken to an isolate Island in the middle of the Med. They forget everything because they were brainwashed. They are failed experiments. Immune to all diseases. I am a Witch-Bird Hybrid. My friend is a vampire-werewolf hybrid. They go back to the U.S. and to places they used to go before all this happened, and they start to