Looks like someone used the wrong syntax in the package_names field.
The books exhibit has
"package_names": "ubuntu-unleashed-2012\r\nubuntu-unleashed-2011\r\nubuntu-practical-guide\r\nubuntu-server-book\r\nofficial-ubuntu-book\r\n",
which should be (iirc)
"package_names": "ubuntu-unleashed-2012,ubuntu-unleashed-2011,ubuntu-practical-guide,ubuntu-server-book,official-ubuntu-book",
Looks like someone used the wrong syntax in the package_names field.
The books exhibit has unleashed- 2012\r\ nubuntu- unleashed- 2011\r\ nubuntu- practical- guide\r\ nubuntu- server- book\r\ nofficial- ubuntu- book\r\ n", unleashed- 2012,ubuntu- unleashed- 2011,ubuntu- practical- guide,ubuntu- server- book,official- ubuntu- book",
"package_names": "ubuntu-
which should be (iirc)
"package_names": "ubuntu-
https:/ /software- center. ubuntu. com/api/ 2.0/exhibits/ en/