A design pattern?

Book = (function(v1) {
    var _v1 = v1;
    return function(v2) {
        if (v2) {
            return v2;
        } else {
            return (_v1) ? {
                pub_v: _v1.replace(/_v1/, 'pub_v'),
                getTitle: function() {
                    return "Got private through public getter: " + _v1;
                },
                getMe: function() {
                    return this;
                }
            } : "Nuthin'!"
        }
    };
})('Ethics1 (_v1 as v1)');
 
console.log( Book('Ethics2 (return v2)') + " & " + Book().getTitle() + " & static public: " + Book().pub_v + " & " + Book().getMe());
 
//o: Ethics2 (return v2) & Got private through public getter: Ethics1 (_v1 as v1) & static public: Ethics1 (pub_v as v1) & [object Object]
 
Book().getMe();
 
//o: [object Object] as { pub_v: .... }