Sonia Gandhi's recently launched memoir, Belonging: A Journey of Love, has a special connection with the younger generation of the family. Here's how her grandson Raihan Vadra and his fiancee Aviva Baig contributed to the book. Here's a sweet little detail about Sonia Gandhi's newly released and much-talked-about memoir, Belonging: A Journey of Love. It has to do with her grandson Raihan Vadra, and his fiancee Aviva Baig.