If you are just a casual user of your local public library, you may not be aware of your library's online, digital reference collections. Your library's offerings may vary considerably depending on local funding. For example, The Maricopa County Library District has an extensive online reference section. Here is a screenshot:
Of course, you will need a library card to access the collections. Many of these collections can be accessed from your own home. One of the most extensive collections of genealogical research material in the collection is the Gale Genealogy Connect collection.
Here is a description from the website:
Gale Genealogy Connect features a wide range of comprehensive references and is powered by authoritative information from Genealogical.com – the parent company of Genealogical Publishing and Clearfield Company, leading publishers of works on genealogy and family history. These unique references – available for the first time in a fully searchable format – cover such topics as genealogy best practices; research methods and sources; immigration; royal and noble ancestry; and much more.The Maricopa County Library District has both the Gale Genealogy Connect collection but also the ProQuest.com collection shown above. ProQuest.com is one of the major suppliers of such online reference information. They have a rather impressive free online collection that rivals the FamilySearch Family History Center Portal.
Your library may also have many local and state historical records of interest in your genealogical research. If you happen to live in a small town like I do here in Provo, Utah, your local library's offerings might be very limited.
Fortunately, many larger libraries offer memberships, i.e. library cards, to nonresidents for the payment of a fee. You might check out your county library or a library in a nearby large city. As I have mentioned before, large university libraries also have online collections. However, few of these collections are available by remote access.