Lighthearted zoo or animal-themed novel?

So, this may be kind of niche, but I figured I'd try here. Every year, I like to get my sister themed Christmas gifts, and this year, it's Steve Irwin/zoos, for lack of better description. For instance, her son is getting Bindi Irwin's picture book, and I've already bought her the Robert Irwin calendar.

So, I'd love to get her a book that's kind of in that animal & zoo theme.

She's a big fan of Emily Henry, has enjoyed some Colleen Hoover, and generally prefers fun, more "beach read" style books. Nothing too heavy or dark, but some suspense and mystery is still fine. She also randomly loved The Gentleman of Moscow, so it's not like she's allergic to a slower pace.

So, if anyone has any zookeeper romances, maybe some kind of Australian safari vibes, or anything that just kind of makes you think "Steve Irwin," I'd love to hear it!