A TRUE L.A. CHRISTMAS. . . Take one goat and a rainbow of ethnicities in the rooming house at the corner of 22nd and Estrella Avenue, and you've got a memorable Christmas in the hood, a feast of sharing and caring. A one-of-a-kind L.A. Christmas. Add to this much-loved tale, two new stocking stuffers -"Miracle on Cahuenga" and "A Christmas Card"- and it's a very Grady Christmas for all. "Forget your usual Christmas stories, this book is the one " S. R. Mallery, author of 'Unexpected Gifts, '