Seeing in how these aliens (soon to be Elbie) are made of pure energy, energy has rules. The most famous of all is: Energy can be neither created nor destroyed. I think this familiar mantra is what gave me the idea of Elbie transferability. First thing I did; took out a piece of paper and wrote down what those rules were.
With about ten of these rules, I took my first run at this world in 2001. After thirty or so versions I have got it pretty refined now how the Elbie work and what they are like. Then again, with the second draft of book two about to be wrapped up, I am discovering new ways to experience Elbie.
A lot of the Elbie attributes and how they operate in our world are written out on the DPA website and Twitter feed. I had one friend ask if we could send people into space to harvest more Elbie for commercial purposes. I told him I didn't see why not, but since we can barely break orbit, that story will have to wait. If you have questions about Elbie and how they work send me an e-mail or Tweet me.