Plugin suggestion - WordPress (Wiki style)

Hi,

Guys, 2 years on Envato as a buyer, first day on a forum.

Can anyone suggest me a plugin/s that will enable creating pages similar to this one, with chapters, etc

http://www.allaboutcircuits.com/textbook/

Another example

http://www.allaboutcircuits.com/textbook/direct-current/chpt-3/importance-electrical-safety/

Any ideas?

Thanks in advance.