""The Book of Inkscape" by Dmitry Kirsanov (No Starch Press)
calls itself "the definitive guide to the free graphics editor."
Inkscape is a professional-level vector graphics editor, and if you
don't know what that means this book tells you right away, in nice
understandable real-people English. The author gets right down to
answering "what do you do with this thing?" in Chapter 1:
""Schemes, charts, diagrams. Plans and drafts. Scientific
illustrations and data graphs. Icons, symbols, logos, and emblems.
Heraldry, flags, road signs. Comics, cartoons, anime characters and
scenes. Maps of lands both real and imaginary. Typography of all
kinds. Banners, leaflets, posters. Web graphics. (Ads, too.) Book
covers, holiday cards, headings, and vignettes. Kids' scribbles and
stunning photorealistic art. Fantasy art, fan art, games art, and
simply art of all flavors and varieties."
"Then the author lists some tasks that Inkscape may not be the
best tool for, and suggest other applications that are
better-suited for them.
"I am so used to looking things up via Google that when I review
a book I shut down networking. Because I think a good software
howto book should be self-sufficient in several ways, and not send
the reader on a Web search to fill in the blanks."