if you are reading some eBooks using adobe pdf reader, you have completed some page like 20 or 30 in one days. Again if you have to read after few days then if you will open the same book, then it will open from first page, It is very horrible experience.
Now you can fix this problem like this
Step 1: Go to Edit Menu
Step 2: Click on Preferences in your Adobe PDF Reader
Step 3: Select Document tab and check the “Restore last view setting when reopening documents.”