Timetravel guide to helping the Axis/Allies win World War II

  Well I think it would depend on who you want to win and how.  Not just in terms of one or more nations or groups but also what sort of society emerges successful from the war.  For example for Britain would you want a revived conservatism of some kind similar to what had dominated the country for the last century, a socialist Labour with the welfare states and government intervention to help those in need or some other option?  Similarly do you want a collective victory for that nation or one where just about everybody else is gravely weakened compared to OTL - which I assume is the base line the people are coming from - or just some areas/powers more exhausted than OTL.

  The next thing would be how is this guide available to the traveler?  Some sort of internal knowledge artificially made permanently available to him/her, old physical formats such as books, or something electronic - which would be more compact and could persuade down-timers by how advanced it is but might be difficult to maintain.

  Then what information would you want them to have.  Knowledge of whom to contact and how to influence those people as to accept what your saying and presumably what advice they give.  Which again depends on what the aims of the person would be.  One thing I disliked about the initial Foresight War was that the advice was to accept the fall of France and western Europe rather than avoid it - as is happening, albeit not due to [known] ASB intervention - in 575's TL where Hitler's desired autumn 39 attack on France occurs - when the latter option would be relatively easy and better for most of the world, at least in the short term. - If I was in that position I would definitely prefer avoiding the massive destruction and the wear on Britain resulting from such a long and costly conflict, let alone how it so greatly weakened Britain for the disaster in the far east.

  OK thanks.  That gives a clearer view of what's required.  Still have to have separate sections for what nation/leaders you would want to influence/persuade to your arguments.  Obviously going to be different trying to influence one of the western democracies compared to say Hitler, Stalin or the assorted collection of maniacs who had power in Japan in the 30's.    Could be interesting trying somewhere where the traveler wants to influence France or Italy.

OK - may seem the nitpicker here but as You headed it as Allies/Axis I expected it to be editions for either with their local different interest groups of course depending upon when to ship off the merchandise. That would make them different editions a base for those wanting an Allied victory, another for wanting an Axis victory, another for socialists in Allied/Axis states wanting essentially to change government and how to do things so as not to tumble the fragile house of cards so ruin society and ensure opponent victory etc. - with of course special editions for Soviet communists/counterrevolutionaries/bourgeois etc. etc. etc.

I know would really make a mess!

Well if You try to change the course of the war You will change the course of history as such.

If You manage to avoid WWII or have the Western Allies stop and defeat the Germans it will lead to another world than the one we live in today. I think there is a number of TLs around here of a world without WWII or early end to it and each I expect to have an outcome different from OTL. My "A Window of Opportunity" is just one such. Not necessarily in our of todays perception but an outcome of a change world.