Nielsen wrote a very interesting book. Most users know only of hypertext structures by the Internet, but Nielsen makes the world go round. I thought there where five or six different types of hypertext, but by reading this book I had to change my view on Hypertext structures very rapidly. I didn't expect so many different types. Nielsen soon changed the way I look at Hypertext structures and usibality of systems. Nielsen has a very clear style of writing, he offers lots of examples and he has a great sense of humour too. I can recommend this book to everyone who want to know more about hypertext structures, usability and the Internet. Especially those who are working in the field of education, webdesign and marketing should read this book. It offers a good scope on the world of hypertext structures, it's written in a clear and understandable way, and it's fun to read too!