Do you work with project binders, or keep a collection of product catalogs or reference books on hand for active projects? Do you have a small bookshelf, but find yourself getting up to go to it every five minutes. How about a small mobile bookshelf that you can roll over next to your workstation when you need it, and then park back in its place when you don't. A bookshelf on wheels - nobody makes that?
Of course they do. They are called book trucks, or more simply library book carts. They are used to travel books from the return back to the circulation shelves, or any other time librarians need to move books. And luckily for you they come in endless configurations, because I suppose librarians can't make up their mind which they like best! In any case you are the beneficiary of all that indecision. There are many manufacturers too, as a book cart is a bit of a commodity. We like Bretford, owned by Herman Miller, they are on the better side of the quality equation, but you can find dozens of vendors with your friend Mr. Google.