VLSI design books written in the 1990s/2000s are still relevant today. This is one of the areas which are arguably at the forefront of knowledge advancement, and yet the tools of the trade, concepts, languages are still the same.
Okay, but who actually walks into a physical book shop and expects to find a highly technical book relevant to less than 0.01% of the population? Unless it's attached to the CS/EE campus of an university.