It's an open book that Jane has got married

It's an open book that Jane has got married what does the sentence mean:"I is an open book that Jane has what dose the sentnce mean it is an open book that iane has He has got married. It's an interesting book Is that Jane?Yes,it's How long has that factory been ____ It's been open ____ seve an open book Kate's read the book twice.--____.A.So is Jane B.So has Jane she's got it= she has got it对吗 英译汉it's said that book by j.k.rowling has beem translated in A______ to Tom.Jane got married last month