Another Christian video game pioneer was Bernard K. Bangley, who wrote "Bible BASIC : Bible Games for Personal Computers" with his son, David Bangley. Bible BASIC was published by Harper & Row in December, 1983. His book included type-in BASIC programs to create Bible games. The programs were intended to work in any version of BASIC, but the book included tips for adapting the programs for the Apple II, Atari 400/800, Commodore VIC-20/64, and TRS-80, as well as extending and customising the programs to make them more interesting.