Servers and server hardware are topics that many publications do not want to write about. The main reasons are technical complexities - there are many aspects that go beyond consumer hardware - and a limited readership. Only administrators and decision makers, along with a handful enthusiasts, really care about professional class hardware. However, server hardware is closer to desktop hardware than you think, and the additional knowledge certainly can't hurt.
When people think of servers they sometimes associate the topic with huge computers, heavyweight hardware and highest performance, but that isn't necessarily the case. There are various form factors and a plethora of hardware and applications, making it difficult to find a universal definition of a "server".