William Fuller's book "The City" which is currently posted on Kickstarter....
The way it works is that you find a project that interests you by browsing the Kickstarter or Indiegogo website. You learn about the project and review the levels at which you can support it. You get some type of perk depending on how much money you pledge, which may include a copy of a book once published, a special print or artwork, or even a thanks on the artist's website.
You only pay if the project gets fully funded.
Check out William Fuller's book project, and look at other artists who are asking for your financial support, on these great websites.
And then do your part to support the arts. It doesn't have to be a lot - every little bit helps.
The arts need you.