Missing images 0 images

[M5 Studio+Design]

All of my LR images are gone. It shows zero images. Not an exclamation mark, but no images at all. As if I never used LR in the past.
I have edited images back to 2014 and books.

[Jao vdL]

What version of Lightroom are you using? Your reference to Books implies you are using Classic. You might accidentally be opening the cloud version of Lightroom (called Lightroom Desktop confusingly) instead. It is also possible you are not opening the correct catalog if you are actually using Classic. 

[M5 Studio+Design]

Hello, I am using LR 5. V-5.7. That is the version that I have open.

--
Glenn Mancini

[Jao vdL]

Wow that is a very old version. I am surprised it still works as that is not compatible with current Macs and Windows machines. You are probably not opening the right catalog file. Select File from the file menu and look in "open recent" for your correct catalog. If you don't see anything there, use open to browse to your catalog.