Each of the red links below is to a YouTube video that deals with apologetics among Americans today:

What Is Apologetics?

Learn How To Do Apologetics In The Twenty-First Century With Ravi Zacharias (1 Hour)

Razi Zacharias International Ministries YouTube Channel

Here are some basic apologetic questions answered on YouTube about different world religions popular in America today.

Mormonism:

Do Mormons Believe In The Same Jesus As Christians?

Islam:

What is Sharai Law?

What is Jihad?

Does The Quran Have Any Historical Veracity?

Is Islam A Religion of Peace?

Secular Atheism:

Understanding New Atheism

Jehovah’s Witnesses:

Who Is Jesus According To Jehovah’s Witnesses?

Here are some good books on apologetics (with amazon.com links):

Tactics By Gregory Koukl

Evidence That Demands A Verdict by Josh McDowell

Here is one about Islam for you:

Seeking Allah, Finding Jesus by Nabeel Qureshi