Restoring lost icons
Lets try following to restore your old reading list:

Quit Safari. In the Finder, hold down the option key and select 


  Go > Library


from the menu bar. 

The reading list is stored in the file Safari/Bookmarks.plist in the Library folder. 

You have two choices:

Restore the file from a backup that predates the issue; or

Move the file to the Desktop, relaunch Safari, and import from the old bookmarks file (File > Import Bookmarks...).