Besides many other books I can recommend “Only You Can Save Mankind” from Terry Pratchett. It’s meant to be a novel for children but if you have loved playing Zak McKracken, Maniac Mansion or other old games (or if you grew up with old (Sega) games) then you should read it. 
http://wiki.lspace.org/mediawiki/index.php/Book:Only_You_Can_Save_Mankind
(@ZakPhoenixMcKracken: There is a story element in it that will remind you of this. )