While "Out of the Salt Shaker" is a helpful resource, containing sound mindset and heart and examples about *sharing* the Gospel, I cannot recommend it. Rebecca taught an incomplete and different Gospel than what is found in God's Word!
When answering the question what can we do to be saved, she said, we "do this in prayer by inviting Him into my life." This is not in Scripture! Not only did she teach a way to salvation that is not in scripture, she entirely left out of her book Paul and Peter's teaching about the matter.
"Now when they heard this, they were pierced to the heart, and said to Peter and the rest of the apostles, “Brethren, what shall we do?” Peter said to them, “Repent, and each of you be baptized in the name of Jesus Christ for the forgiveness of your sins; and you will receive the gift of the Holy Spirit." (Acts 2:37-38)
Col 2:11-12 "and in Him you were also circumcised with a circumcision made without hands, in the removal of the body of the flesh by the circumcision of Christ; having been buried with Him in baptism, in which you were also raised up with Him through faith in the working of God, who raised Him from the dead."
Ro 8:3-5 "do you not know that all of us who have been baptized into Christ Jesus have been baptized into His death? Therefore we have been buried with Him through baptism into death, so that as Christ was raised from the dead through the glory of the Father, so we too might walk in newness of life. For if we have become [a]united with Him in the likeness of His death, certainly we shall also be [b]in the likeness of His resurrection, "
1 Pet 3:21 " Corresponding to that, baptism now saves you—not the removal of dirt from the flesh, but an appeal to God [q]for a good conscience—through the resurrection of Jesus Christ."