Books like Christianity 101
Gilbert G. Bilezikian
Christianity 101 is 287 pages, about 5 hours 16 minutes at 250 words a minute.
10 books to read next
How long each takes
Mere Christianity 3.5 h 
Basic Christianity 2.6 h 
Simply Christian 4.4 h 
Theology 5.1 h 
The Universe Next Door 4.5 h 
Peace with God 4.1 h 
Basic Theology 11.0 h 
Billy Graham 10.0 h 
Christian Beliefs 2.9 h 
Know Why You Believe 2.8 h Bar height shows length. Estimated at 250 words a minute.