So, to use what you have right to, you have to pay also Microsoft for a Windows license and WMWare for its virtualization software.
And while you're struggling against limitations,
copyright infringers have downloaded that same book for free, multi format and readable on every device in the market.
Welcome to the DRM jungle.
BTW: you can ask booksonboard if they have that book in another format, like LIT. You can google for "convert lit", strip the DRM in it (breaking the law, if you're in the US) and upload it to your sony with calibre.