Journey has 10 lessons with 122 pages. Most disciples have their own disciple before they complete the last lesson.
Journey is one complete book for discipleship and discipleship training.  No other materials or books are required.
The book is a standard 8 1/2 by 11 size with perfect binding.
The 10 lessons cover 100 topics.  Here is an overview of the themes:
Lesson 1 - Salvation
Lesson 2 - My Assurance
Lesson 3 - Prayer
Lesson 4 - The Church
Lesson 5 - Discipleship
Lesson 6 - The Future
Lesson 7 - Spiritual Formation
Lesson 8 - Faith
Lesson 9 - Conversation
Lesson 10 - Loving God