Create your own one-off wallpaper
This is an extremely cost-effective way of creating a feature wall. The main skill you'll need here is patience, as it can take quite a while to complete a whole wall!
If possible choose a book which is no longer "usable" - my dictionary was already missing lots of pages so it didn't serve its intended purpose any more. I am a fan of the vintage look but another reason why older book pages are appropriate for this sort of project is that they tend to be more porous and therefore easier to glue.
Mark horizontal and vertical lines to guide you using the measuring tape or ruler and spirit level. Start on the bottom corner of your wall: apply wallpaper paste, then place a page and flatten it taking care of eliminating any wrinkles or air bubbles with a damp sponge. Clean up any paste spills with a paper towel as you go along.
If the book pages you've chosen are not uniform, either because they come from different books or feature both text and illustration as mine did, make sure they are evenly distributed across the wall. Once you've finished, allow the paper to dry thoroughly before replacing any furniture or hanging pictures.