The Stockholm Octavo by Karen Englemann Harper-Collins-ECCO, $26.99, 421 pages, ISBN 978-0-06-199534-7 After the wild ride we took with last week’s cultish thriller, (Gun Church, MBR 87)  I wanted to find another equally compelling novel, but one that’s the polar opposite in content, style and focus.  Dame Fortune smiled and sent all of us a beautifully-written debut novel that’s historical fiction at it’s very best.  It combines history, romance,