Online ressources
This thread contains some of the main sources to the work by Martinus.
The Martinus Institute
The homepage of the Martinus Institute: http://www.martinus.dk/en
Bookshop
The Martinus Institute's Internet Bookshop: See shop.martinus.dk. Here you can order Martinus' books in 19 languages plus the original Danish, and pay by credit or debit card.
Notice that the Martinus Institute gives discount to several contries.
Martinus' work online
The translated works of Martinus online: http://www.martinus.dk/en/ttt/
At the moment the read-and-search function covers the following books and volumes: Livets Bog (The Book of Life) 1, 2 and 4 and The Eternal World Picture 2.
Ole Therkelsen answers the question: "Do we only live once or do we have eternal life?"
http://www.youtube.com/watch?v=6k5v0-PDZrY