For those who are looking for a fabulous source for genealogical records and histories, or even just a history of a particular historical family, please do go to www.archive.org and type the name you are looking for into the search box. There are some fabulous sources in there, and it's also a good place to find books that you have located on Google Books and are in the public domain, but haven't as yet been transferred to the "full view" option.
I usually locate books on Google Books, but download from www.archive.org in djvu format because you can search the text in this format, where you can't search for text amongst the pic's in pdf format. Hope I'm making sense here!! Anyway, djvu allows you to copy text really easily. For those using Adobe Acrobat for pdf files, you might want to consider downloading the free Foxit reader, which also allows you to take text from pdf files. :))
archive.org offers downloads in various formats, or you can read a book online, if you wish. :))
Plantagenets: for those researching the Plantagenets, please do check out this link, for "The Plantagenet Roll of the royal blood". Stacks of genealogical charts which can, of course, be extracted either as text or images, depending on which branch you are concentrating on. :))
http://www.archive.org/details/plantagenetrollo01ruvi