Office 2016 is the current version of Microsoft Office Suite as of July-2018. Recently Microsoft has changed the distribution of its Office programs as online installers, that's why it is extremely hard to get disk images for offline installations. But here I have provided the links of their backup media downloads, based on click-to-run technology.
Please bear in mind: these files don't come up with product keys, so you have to buy a valid key and activate it with your Microsoft account in order to use your Office products.