I only checked that title...can't be sure what I'd find in a search for the other titles. But Cambridge is in Massachusetts...and it's the home of Harvard *and* MIT. To the typical resident of Cambridge Che is a right wing reactionary.
But I do expect that title,and any other that's still available in the network,to disappear soon. After all,Princess Liawatha,our *senior* Senator,will surely demand it.
There are also at least 16 copies on sale at eBay. There are 39 copies of And to Think That I Saw It on Mulberry Street. Yesterday it was 520. It looks like eBay backed off.