If your looking for a particular inmate it isn't hard to find her (or him as the case may be).
A common mistake many people make when looking for an inmate is to look in their hometown or the town they are known to live in. If you think this person is an inmate you should be looking in the state or town the person committed the crime in.
Once you have that information you can find an inmate fairly easily. Now consider the crime. Is it a felony crime or a misdemeanor? A misdemeanor crime will have you looking for your inmate in a county jail. Google the name of the state, county and the word jail.
Like - Tennessee Davidson County jail -.
You should be able to find contact information from there. Call or write the jail and ask if your inmate is there.
If your inmate has committed a felony they could be in state prison or a federal prison. Use the governments Bureau of Prisons website to find a federal inmate. You will need information such as correct name, gender, birth date etc. It would be even better if you have their inmate number.
If you believe your inmate to be a state prisoner look up the official .gov site for that state and search for an inmate locator. Most states have them.
Here are some links that you may find helpful for your inmate. Offers range from free books to religious teachings and more.
Books to Prisoners
Prison Book Program
Inside Book Project
Request a Edgar Cayce Book
Books to Prisons
Tips and Gifts for Inmates
College Guild- free classes for inmates
Crossways Ministries- ministers to inmates and families
Bible Correspondence Class
Institute for Prison Ministries