It depends a lot on what books. Many technical books age extremely quickly. You definitely don't want a 30 years old C++ book except for some sort of historical research purpose.
But even in literature there is timing, themes, references and fashion. You'd have a hard time writing Don Quixote today, because hardly anyone reads chivalric romances anymore, so the vast majority of people wouldn't know what you're even parodying. And I suspect most modern readers of Don Quixote don't really get it, excluding those with an education in european medieval literature.
Even without going that far, there are fads and fashions. If you want to write about wizards or vampires there probably are better and worse times to do it.
Even playing your cards right, how likely are you to get a hit? Because there's really no lack of good books on most any subject at this point, and it takes a very dedicated reader to exhaust the existing catalog, and the easiest way for a reader is to find out what's popular and try that, rather than giving a new author a chance.