Fierce Kingdom by Gin PhillipsRead about another book on the list.
The events in Fierce Kingdom aren't given an explicit place on the calendar, but it all takes place over the course of three hours on one sunny evening at the zoo: a location you may well find yourself this summer. But this is a trip to the zoo more terrifying than any you've had before — because an active shooter situation keeps the main character Joan and her four-year-old son running for their lives throughout the entire length of the novel.
--Marshal Zeringue