PROVIDENCE, R.I. (AP) — A new book by former U.S. Rep. Patrick Kennedy, youngest son of the late Sen. Edward Kennedy, openly discusses what he says are the mental illnesses and addictions of himself and his family members, and takes on what he portrays as a veil of secrecy used to hide the problems of America’s most famous political family.The memoir, “A Common Struggle,” due out Monday, focuses heavily on his relationship with his father and how the younger Kennedy often felt he let his father down while coping with bipolar and anxiety disorders and repeated trips to rehab, even as a Rhode Island congressman.By his telling, it was a singular experience growing up a Kennedy: Family members have the habit of giving each other autographed photos of themselves; he got one from his father when he was just a baby. A family photo printed in the book depicts him in his bedroom as a young child showing off his aquarium to Henry Kissinger.But even stranger was browsing through a bookstore one day and discovering a shelf of Kennedy books, and realizing all the family secrets he wasn’t supposed to talk about were written there, he writes.“The books were often riddled with inaccuracies, but also riddled with facts that probably would have been much easier to hear first from close family members and perhaps with some context,” Kennedy writes.He says his father spoke with him only once about his 1969 car accident on Chappaquiddick Island that killed his father’s passenger, Mary Jo Kopechne. It happened one year as the anniversary approached.“’I just want you to know how bad I feel about everything, and I’m really sorry you have to hear about it,’” he says his father told him.