IIRC, those five novels are included in the Hugo Voter Packet. If you buy a supporting membership ($40/€35) you will have access to them as well as many of the other works nominated for this year's Hugo Awards (more details about what is include at this link:
http://file770.com/?p=35109). And you would be granted voting rights for awards, also.
But you need to hurry up because the voting period closes tomorrow (July the 15th) and the packet won't be available afterwards.