You will notice that Once Undone is actually a complete book already.  It runs about 110,000 words, and I am pretty happy with it.  I plan on making a trilogy, with the second book already in progress!  The second book is titled Today Unbound, and the final volume Forever Unwritten.  You will finally find out what drove our mysterious and doomed friend to throw herself off that bridge, and the consequences of that fateful leap that spanned over a thousand years!