One of the easiest and least expensive ways to build a family library is to buy used books. Most library societies have book sales when they cull their shelves or when donations are turned in to make a bit of money for the library. Our local library used to do these yearly and now have a sale a couple times a year. I try to put these events on my calendar and set aside a little money to spend at the sale. Pricing can vary widely. Currently our library sale charges $5 per bag for books. I knew this and budgeted $15 to spend. I also brought along Makayla, my 15 year old, who is building her own personal library.
This time we came away with 45 books between the two of us, for an average cost of 34 cents per book. Makayla was most excited by the Merck Veterinary Manual she found. She started exploring it from the moment we got in the car after the sale, sharing facts and asking if I remembered how to convert Celsius temperatures to Farenheit.
Our children's education is worth investing in - but sometimes the wisest investment is spending a little time browsing used book sales.