NVA is a format for documents similar to the more popular PDF and mostly used to store medicine-related books. Anyway, it has become close to obsolete, being very rarely used nowadays, so rare that it took me many hours just to find a sample NVA that I could use to test this application.
Anyway, NVA Reader works fine. It's a simple tool that offers a really easy and convenient method of opening and reading NVA e-books. It's in fact so easy to use that even complete beginners can handle it without any problem. Basic options are also available, allowing the users to rotate or zoom in and out the pages; to select, copy and highlight text; or even to search for specific text strings. You can even add notes and bookmarks or print pages right from the application.
NVA Reader is lightweight and smoothly running, and though it's optimized for mobile devices, it performs flawlessly on Windows computers as well. It can open and allow reading even books of 1Gb in size without any problem.
To sum it all up, NVA Reader is a nice tool that makes reading NVA e-books a simple and enjoyable experience.