ShepardJS event bind to only have one tutorial open at a time.

singleTutorialHook

var tutorialMaster = [
    "tutorialOne",
    "tutorialTwo",
    "tutorialThree"
];

function closeOtherTutorials () {
    for (tut in tutorialMaster) {
        window[tutorialMaster[tut]].cancel()  //Or however you track your tutorials.
    }
}

//Event hook to prevent multiple tutorials

Shepherd.on('show', function() {closeOtherTutorials()})