10/40 Window Missions Training & Bible Resources
Equipping believers for biblical discipleship, cross-cultural evangelism, and global outreach
Welcome to Missionary John Online — a missions training ministry dedicated to preparing believers for effective service among the world’s unreached peoples, especially those in the 10/40 Window.
Our Mission
Missionary John exists to advance the Kingdom of God through Scripture-based teaching, evangelism, prayer, and missions training. We equip believers with practical tools to grow in Christ and confidently share the Gospel with the unreached peoples of the world. Every resource on this site is built on one conviction: the Word of God is sufficient for every challenge the mission field presents.
Whether you are preparing for your first mission trip or have spent years in cross-cultural ministry, you will find training, tools, and truth grounded in careful biblical exposition — from Greek word studies to practical field guides.
The Importance of the 10/40 Window
The 10/40 Window spans North Africa, the Middle East, and Asia — between 10° and 40° North latitude — and is home to over three billion people with little or no access to the Gospel. This region includes the majority of the world’s unreached people groups, the largest concentrations of Muslims, Hindus, and Buddhists, and some of the most challenging mission environments on earth.
Every believer can participate through prayer, evangelism, discipleship, and financial support. You do not need to board a plane to have a Kingdom impact in the Window. You need a willing heart, a prepared mind, and a Word-grounded strategy.
Browse the full article library →10/40 Window Missions Training Resources
Browse our growing library of free missions training content — all grounded in Scripture, all practical, all freely available.
Featured Resource: The Missionary Toolkit
The Missionary Toolkit is a complete guide to digital evangelism, online ministry, and missionary success in the modern age. Covering everything from cross-cultural communication and missionary training to burnout recovery and building a sustainable ministry presence — it is the foundational resource of this site and the starting point for every serious missionary student.
Biblical principles, proven strategies, and practical field methods — written in plain pastoral language for missionaries, church planters, and mission-minded believers worldwide.
About Missionary John
John M. Thata is a cross-cultural communicator and author affiliated with Caravan Missions, serving among unreached peoples in the 10/40 Window. He is the author of the Missionary Success Series — a growing library of training and discipleship resources available on Amazon.
Read full bio →Join the Mission
God calls every believer to participate in His global mission. Your obedience — through prayer, giving, and going — can impact lives for eternity. Partner with us to reach the unreached peoples of the 10/40 Window.
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