I've added a couple more links on the right sidebar for historical fiction. I now know of two sites devoted to historical fiction for kids: my favourite here, Historical Fiction for Children, which looks slightly amateur, but is a truly amazing resource and includes short synopses and age recommendations. It seems to be mostly UK authors which is a bonus (the US seem to be great at producing historical fiction for kids, but the history tends to be US-based).
The other site is here , Historical Fiction for Children and Adults, that I found today on a home ed list. I haven't had much chance to look at the latter, but I suspect at least some of the material is duplicated between the websites.
In addition I've added a web link (again from a home ed list today) to a site that lists historical series. These seem to be all adult books, but may be useful.
One day I will compile our own subject lists of historical/subject fiction we've read. Currently we're venturing into the realms of World War I and fiction has been a little difficult to track down. Will keep you posted.