What is tax lien investing?

Does anyone here know about investing in tax liens? Or can anyone suggest a good book on this topic? I heard you can make between 16% to 36% with them.

Tax lien investing means buying tax lien certificates. These certificates happen when local governments put liens on properties for not paying taxes.

Tax lien investing involves purchasing a legal claim against a property when the owner fails to pay property taxes. These liens are placed by local governments and can be bought by investors at public auctions. Investors pay the taxes owed and earn interest as property owners repay the debt over time.