Now also available free in Canada via Amazon, as noted above.
For those who read and liked it, The First Wave, #2 in the series, is a mere $3.62 at both
Amazon and
B&N. The rest of them are $9 and up.
Edit: Kindle users comfortable and adept with the necessary conversion process may prefer to get the B&N ePub versions (1st book still free at B&N). It turns out both titles are in the dreaded Topaz format.