Metro Exodus The Two Colonels has many different trophies and achievements, one of which requires hunting down several diary pages.
There are 9 of these pages to collect and they can be tricky to find but we have you covered, below is the location to all 9 pages. Along with a video if you need it.
Thankfully the auto-save features are quite handy and forgiving and are basically saved before each checkpoint, unfortunately only it only saves 3 checkpoints. Still if you are keeping an eye on on your location you should still be able to find the pages without too much of a hassle.