Bubbles Of Creation. Connected Realms, #3

It's fascinating at the junction of universes - until one of them starts throwing shockwaves!Alexan and Petra have settled into an idyllic life as Jarl and Frue of Ygg, each satisfying their respective divine curses.  But Siluria next door starts generating massive shockwaves, unable to absorb the energy being generated by the scourgings every seven days.  Worse, Siluria is home to the warlike diligar, who are likely to launch an invasion as their home is ravaged.
 It's hard to unravel a puzzle the size of several universes.  Alexan has only just begun to solve it when one of his experiments poisons an enigmatic divinity far greater than himself or Petra. But mistakes can also provide opportunities.