Libraries are as much about digital resources these days as physical 3D items.
If you haven't already availed yourself of membership of your local public library card, you are missing out.
Make sure you have a library card for your state library and the national library too. All of them have access to different eResources and it would be a shame to not use them. Check out some of the offerings here, here and here.
Looking for a genealogical encyclopedia? Look no further than Eastman's. But if you want to hold something in your hands and flick through it then the Who Do You Think You Are: the encylopedia of genealogy : the definitive reference guide to tracing your family history by Nick Barrett isn't bad either.
"There is nothing like first-hand evidence"
A Study in Scarlet Sir Arthur Conan Doyle
Evidence Explained by Elizabeth Shown-Mills seems to be the bible and I bought a 2nd-hand copy on Abebooks as previously highlighted by the lovely Carmel. I'd be lying if I said I'd read it. You really don't read this book. It's more of a reference tool.
If you find it too intimidating (it is a rather weighty tome) then something like Citing historical sources: a manual for family historians by Noeline Kyle should be the ticket.
If you want to drill down into whether or not your work will pass muster with the genealogy police, then you might also want to grab a copy of Genealogical Proof Standard: Building a Solid Case by Christine Rose.
Of course a Style Manual never goes astray either.....all family historians want to be known as stylish.
Here is evidence of me being stylish for a second last year travelling home from Canada on the Dreamliner. Thankfully I have stylish friends who lend me their wardrobes so I can fool everyone ;) Yes, I may have indulged in some wine a little later into the flight.
What do you think about evidence, proof, standards and style? Are the benchmarks too high or too low?