SetDirectory["C:\\drorbn\\AcademicPensieve\\Talks\\NCSU-1604"]

Make

Make::usage = "Make[targets, sources, Hold[action]] makes a target, or a list of targets, given sources, or a list of sources, in the style of the unix 'make' command.";
Make[target_String, sources_, action_Hold] := Make[Evaluate@{target}, sources, action];
Make[targets_, source_String, action__Hold] := Make[targets, Evaluate@{source}, action];
Make[targets_List, sources_List, action_Hold] := Module[{},
If[
(And @@ ((FileType[#] =!= None)& /@ sources)) &&
Or[
Or @@ ((FileType[#]===None)& /@ targets),
Min[AbsoluteTime[FileDate[#]]& /@ targets] < Max[AbsoluteTime[FileDate[#]]& /@ sources]
],
Print["Making ",targets, " ..."];
ReleaseHold[action]
]
];

Session.pdf

dir="C:\\drorbn\\AcademicPensieve\\2016-04\\GaussGassner";
nb=NotebookOpen[FileNameJoin[{dir,"GaussGassner.nb"}], Visible -> False]

SetOptions[nb, PrintingOptions->{"PageSize"->{4 72,21 72},"PaperSize"->{4 72,21 72}}]

NotebookPrint[nb, FileNameJoin[{dir,"Session.pdf"}]]

nb//Options

NotebookClose[nb]

Output

{
"TitleNotes" -> "This is the working directory for Talks/NCSU-1604/\n<p>"
}