I just remembered an excellent online resource on the early modern UFO- history (1940's and onwards). Strictly speaking, this isn't a
book recomendation. But I think it belongs in this thread all the same:
Back in 2008 on the
Daily Kos (an online community with a heavy political leaning towards the Democratic Party.), someone with the username 'two roads' began posting weekly posts on the ufo phenomenon under the common title:
Saturday Night Uforia. This was during the election campaign, and I think the posts were a response to how the UFO-phenomenon was being used for ridicule and smearing. For instance the democratic candidate
Dennis Kucinich received a lot of ridicule for admitting to seeing a UFO. So the aim of these posts were to show, based on the original documents and newspaper articles, that this was a phenomenon to be taken seriously.
These weekly posts continued until 2011 when all the articles were moved to their own site:
www.saturdaynightuforia.com. Combined these articles constitute a treasure trove of well-documented UFO-history and as far as I can tell the series is still ongoing.