yes the time 50shades was a fanfic it was available for onl9 reading but now its not .. so ... anyway yes u can go read books online legally here
http://www.gutenberg.org/scribd.com
http://www.gutenberg.net.au/
http://manybooks.net
http://www.munseys.com
http://www.webliterature.net
http://www.feedbooks.com
http://www.fullbooks.com
http://www.bibliomania.com
http://www.classicreader.com
http://www.pagebypagebooks.com/