Something really really wrong with amazon.com

[Alex]

Not surprised something like this happens. All you can do it let them know and they'll see if something can be adjusted.

But this is the risk with all auto-recommend systems (remember the brouhaha a couple years when Wal-Mart's system was connecting Planet of the Apes to Martin Luther King topics)?

Especially when the items/topics involved are relatively niche and you don't get enough data to really support conclusions about connectedness. And especially if you are trying to use the system in a horizon-expanding way (it is easy to find the pattern in people who buy Disney books also buying other Disney books; much harder to determine if there is significance that of the 128 people who bought Disney A to Z in the last week, 3 also bought Season 3 of Battlestar Gallactica.