Nina and Daniel are both operatives with superpowers working for WISE, the World Intelligence Security Endeavour, to protect civilians from strange monsters called Beakers while they investigate a plot to gather historical artifacts in All Our Yesterdays, the second book in Janowsky’s The Persistence of Memory series. Nina’s past as a goddess who’s lived for thousands of years and Daniel’s misplacement through time from World War Two to 2012 makes them both a little out of place in modern times, and results in some hilarious incidents as they navigate their romantic relationship. Janowsky weaves interesting titbits of Sumerian and Mesopotamian myth into the narrative as Nina encounters a sect of fanatical followers of her goddess mother, Ishtar, and their disturbing association with the Nazis.

Despite familiar elements that often make All Our Yesterdays read like a Captain America and Wonder Woman crossover fanfiction, readers will find it challenging to immerse themselves in this blend of historical and superhero fiction without first reading Déjà Vu, book one of the series. Thrilling action sequences with plenty of superhero oomph alternate with tender yet steamy romantic scenes between Nina and Daniel to fill in the gaps between plot points as the superhero team of WISE discovers the ultimate purpose behind the artifacts and races to retrieve a pivotal relic before their enemies can recover it. All Our Yesterdays is an entertaining read and Janowsky merges historical fiction with the superhero fantasy genre with rare skill but this is not a standalone novel and readers should start with the first book of this series, Déjà Vu.

The Persistence of Memory Book 2: All Our Yesterdays by Karen Janowsky is the story of Daniel and Nina, two superheroes in the middle of a war who are determined to stay together, no matter what. They face monsters, but the biggest threat is yet to come. There is a lot happening in the book with time jumps, ancient gods, and other dimensions. The story opens with an ancient goddess, cursing a man who refuses to join her and become her concubine. Then we are back with Nina and Daniel as they are in the middle of a fight. They both are well written and I like how the story delved into their pasts and explored their relationship with each other. They are both strong individuals but are able to work well together.

Karen Janowsky has written an interesting book with The Persistence of Memory Book 2: All Our Yesterdays. I think that the characters were well developed. I did not read the first book, but I understood enough of what was going on to follow this one. It has a lot packed into it, although it did jump around a bit at times. The ending left it open for the story to continue and I understand that there is another book in the series. I would be interested to see how the story ends. If you are a fan of adventure/supernatural/superhero style books, then you might enjoy this series. I would also include it in the supernatural suspense genre too as I think it would sell well there.