‘What Do I Know: A Guide to Living’ will arrive on April 6, 2027 via The Open Field, Maria Shriver’s publishing imprintRob Lowe; the cover of ‘What Do I Know: A Guide to Living’ by Rob LoweCredit: Weiss Eubanks/NBCUniversal via Getty; PenguinNEED TO KNOWRob Lowe announced that he is publishing a new book, What Do I Know: A Guide to Living, on Sept. 28The book, arriving April 2027, is his first in 12 years and published by Maria Shriver’s The Ope…