Digital data is also a tangible good. ITAR doesn't make a distinction. Technical drawings in autocad format or technical documents describing things can still be export restricted... and just because somebody else already "exported" it once (no matter how they got it) doesn't mean it's all of a sudden acceptable to disregard your responsibility to protect export-restricted information from unauthorized disclosure or export.
In this case, it's not so much a title that'd be a problem -- It's Chuck being concerned about the contents of a paper teaching you to fly a Tomcat would be treading in to the grounds of export-restricted technical data. Without in export compliance review, it'd be tough to determine, particularly if it's not original data but derived from fictional documentation that we have, but I fully understand his desire to not tread in to murky waters.