You can keep a huge genealogy library in your own home. You don’t need to purchase bookcases or build an addition onto the house. You can keep the entire collection in your computer or even in a handheld Kindle, iPad, or similar device. Actually, you don’t have to keep a local copy at all, as the entire collection is available online, and you can retrieve the books of interest at any time.
Several organizations have been digitizing old genealogy and family history books for several years. The number of available books is still growing daily. Perhaps the largest such collection is available in Archive.org’s genealogy collection. Available items include books on surname origins, vital statistics, parish records, census records, passenger lists of vessels, and other historical and biographical documents.