[newbie] Only one Linux book opens

[WallerRaknakce]

    Dear Anyone, When I put in my Linux Mandrake 7.0 #3 CD in order to read 
some of the books only one book will open for me. This happened before with 
my first install of Linux, too, before the crash. They all opened with 
Acrobat reader under Windows 95. What do I need to do for this? Thank you. 
Marcia