Another very quick but useful tip that I first had to do several years back and most recently a few days ago was to have to tell Windows to ignore the usual security constraints and allow other data sources. Otherwise when you attempt to load e-books from these data sources, you will see the following:-

REGEDIT4
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp\1.x\ItssRestrictions]
“MaxAllowedZone”=dword:00000001
“UrlAllowList”=”J:\”
“NestedProtocolList”=”http:;ftp:”