Can not stress enough the importance of this paradigm. Not having your site designed as responsive is akin to still using Windows 95. It might just still about run certain applications but at what cost - security, productivity, connectivity, efficiency and the list goes on and on. The aforementioned notwithstanding,smart-phones so omnipresent is a very compelling reason to implement RWD.
You do not want to miss out on the millions accessing the internet through this device. The desktop or laptop are no more the default gateway to the web. RWD incorporates functionalities that ensure consistent user experience irrespective of their device type when viewing and interacting with website content.
The client's specifications and objectives were precise and clear. We were also responsible for writing the text content which the client could amend as they see fit later. Main emphasis on the interface was to be clear an uncluttered. Selling books online is the salient feature the client wanted prominent on the home page. Everything else should focus and draw attention to this main characteristic.