Amazon
Send Me! Your Journey to the Nations
https://www.amazon.com/Send-Me-Your-Journey-Nations/dp/0878082948
This book is an excellent starting point for people interested in doing mission works. It goes step-by-step through a process that helps discern their journey in serving as missionaries.
Serving As Senders: How to Care for Your Missionaries While They Are Preparing to Go, While They Are on the Field, When They Return Home
https://www.amazon.com/Serving-As-Senders-Missionaries-Preparing/dp/1880185008
This book answers the question of how you can get involved in the Great Commission of world evangelization.
The Missionary Call: Find Your Place in God's Plan For the World
The World at Your Door: Reaching International Students in Your Home, Church, and School
https://www.amazon.com/World-Your-Door-Reaching-International/dp/1556619642
AskaMissionary.com
Questions about Missionary Training for Missionaries
http://www.askamissionary.com/topic/missionary-training
Ask A Missionary is a service of Mission Data International. It's purpose is to help prospective missionaries along on their journey to short-term or long-term mission service. You can search the site for questions and answers that have already been published. You can also send in your own question and receive answers from their staff and volunteers. Missionaries, mission leaders, and mobilizers also contribute answers and use the site to help and encourage the prospective missionaries with whom they work.
Baptists On Mission
Spiritual Growth Resources - Before, During, After Your Trip
http://baptistsonmission.org/Resources/Trip-Planning-Resources
Emmaus Road International
I Think God Wants Me To Be A Missionary
http://www.eri.org/index.php?option=com_content&view=article&id=42&Itemid=31
Prompted by the high attrition rate of missionaries who do not first "count the cost" of cross-cultural ministry, Neal Pirolo offers this book to help candidates look closely at scores of issues that should be clarified long before they say, "Goodbye." In an easy-to-read style of dialogue, four young people represent thousands of people who are making that statement: I think God wants me to be a missionary!
Serving As Senders: How to Care for Your Missionaries While They Are Preparing to Go, While They Are on the Field, When They Return Home
http://www.eri.org/index.php?option=com_content&view=article&id=37&Itemid=27
This book answers the question of how you can get involved in the Great Commission of world evangelization.
Emmaus Road International
Solutions to Culture Stress (DVD)
Looking at the realities of cross-cultural ministry from four perspectives, this video series is the most basic training we offer to those who go. This video contrasts culture shock with stress, and provides solutions to the issues missionaries face whether on long-term or short-term mission trips. Included is a master set of notes and instructions on how to get the most from these studies.
Got Questions Ministries
How can I know if I am being called to serve as a missionary?
https://www.gotquestions.org/called-as-missionary.html
Operation World
http://www.operationworld.org/
Operation World is a book of prayer information about the world. It is now on its seventh edition and it has been translated into several languages. This book is a must have if you are preparing to become a missionary.
Christian Living
Before You Pack Your Bag, Prepare Your Heart
http://stemintl.org/publications/order/product/mr29
Short - Term Evangelical Missions (STEM) International