The basics on crochet techniques…
This site is an excellent resource and includes step-by-step instructions: http://www.stitchdiva.com/tutorials/crochet
And here are some other references:
Amanda McCavour creates stunning “thread drawings” using fabric that dissolves in water.
And a recent article about the artist and her work from the NY Times: http://www.nytimes.com/2013/05/05/arts/design/orly-genger-in-madison-square-park.html?emc=tnt&tntemail0=y&_r=1&
45:01 – Serra on Tilted Arc: