Here is the Creswick version online for anyone who wants to look:
http://www.gutenberg.org/etext/28700

It was first published in 1917, but it does use somewhat archaic language, probably to fit the setting. It can take a while to get used to that kind of language. If you keep with it you may find that it gets better as you go. One of my college classmates ages ago said that reading Shakespeare was "like walking through cement" at first, but it absolutely did get easier over time. Reading it aloud helped a lot. Of course we also had a professor right there to explain things. <grin>

There are any number of Robin Hood stories out there. I found another public domain one with much simpler language here: http://www.mainlesson.com/display.php?author=marshall&book=robin&story=_contents

And another, with more complex language but maybe closer to modern speech than the Creswick text: http://www.gutenberg.org/etext/964
Also available as an audio recording here: http://librivox.org/the-merry-adventures-of-robin-hood-by-howard-pyle/
(edited to add: Crossposted. This is the Howard Pyle version mentioned a couple of posts up.)

Of course these online texts aren't the same as holding a real book, but there they are in case that helps you.