You can find the Tame Your Thoughts book and Bible study at MaxLucado.com (https://maxlucado.com/tameyourthoughts/) or wherever you buy books!
John 3:16 contains a "whenever" policy. In this episode, Max encourages us that it is never too late to accept God's free gift of grace. If you'd like to dive deeper into this message, Max's book 3:16 is available wherever books are sold.