I read this book via Kindle Unlimited.
Secret Sanctum is another book in the series inspired by MCU characters but with spice (insert the sparkle emojis here). This time, we have iron man. Well, the Steel Soldier, who is Anthony Stern, a playboy, genius, billionaire, philanthropist. You know the deal. The love interest this time is the daughter of the now disgraced Malcolm Odyessy, the former CEO of Heroes Org who was using his Mesmer powers to control his heroes for some ulterior motive. Anthony hasn't forgotten what Malcolm has done, and neither has his daughter, Gwen. Gwen suppresses her own powers, attempting to hide the true strength given by her parents, Malcolm and Persephone. But when her medicine starts to wear off and she begins to sense something darker lurking behind her father's actions, she is left with no other choice than to go to her mother and discuss what she has uncovered. In the depths of space, an alien armada is waiting, plotting their assault on Earth.
This book was different from the others in the fact it felt a lot more plot driven. The others had a bit of plot, but it definitely would fall into the with little plot category on AO3. This one had a lot more plot than I thought and I am genuinely interested to see how things develop with Gwen, The Magician, Persephone and Malcolm from here on out.