I\'m on a search-and-destroy mission for anything Amazon finds distasteful. In the past I\'ve dealt with this by using iconv to convert from \"UTF-8\" to \"latin1\
iconv
I looped a bit through iconvlist() and found this (among other combinations):
test<-"Gwena\xeblle M" iconv(test,"CP1163","UTF-8") [1] "Gwenaëlle M"
I realize, this is not what you asked for, but it might be possible to find the correct encoding.