31.  At that time, "most people thought it didn't," the authors said.

32.  Asked whether his book is destined to be a movie that will inspire even more comparisons, the author said "that's not my problem."

33.  At least that's what Letitia Baldrige, the etiquette author, says.

34.  However the author says, "I know that I would not have done anything differently."

35.  I have no idea what they're good for," the author said.

36.  If changes at the FAA aren't made, the nation's aviation system will "succumb to gridlock," the authors said.

37.  If changes at the FAA, both external and internal, aren't made, the nation's aviation system will "succumb to gridlock," the authors said.

38.  If England had been more conciliatory, the author says, it might have kept the Colonies.

39.  If the device leads to expansion of the aneurysm, the complication could be the Achilles' heel of the new procedure, the authors said.

40.  If human embryonic cells can be converted into myelin-making cells the same way, the method could eventually help treat human neurological disorders, the authors say.