Evidence! How Dr. John Snow Solved the Mystery of Cholera by Deborah Hopkinson, illustrated by Nik Henderson (Knopf Books for Young Readers, 40 pages, grades 2+). When an 1854 cholera outbreak hit Broad Street in “stinky old London”, most people accepted the prevailing theory that it was caused by bad air. With human waste and garbage filling the streets, there was no shortage of that, but Dr. John Snow believed there was a different cause. He’d been gathering clues for years, working as a medical detective to solve the mystery of cholera. When he heard of the Broad Street outbreak, he hurried over to interview families of victims. Their answers led him to hypothesize that the water used by the neighborhood was a possible cause. But old beliefs are hard to change, and Dr. Snow had to keep gathering evidence to persuade the local neighborhood board to remove the pump handle. The back matter gives more information about this particular cholera outbreak as well as Dr. John Snow’s impressive career and contributions to modern medicine.

I’d love to see this exciting medical mystery considered for a Sibert award. The pacing is perfect, as Deborah Hopkinson tells the story of Dr. Snow’s race against time to gather evidence before the upcoming board meeting, skillfully incorporating details about cholera and London at that time. The sepia-toned illustrations convey both the time period and the wretched conditions many people were living in. The reviews I saw recommended this book for kids as young as 4 or 5 (making me wonder if these reviewers know any actual 4- or 5-year-olds), but I think upper elementary as well as middle school or even high school science students would find it interesting. Incidentally, I did learn via Google that a fever is rarely a symptom or cholera, but the rhyme was just too good, so I took poetic license with this blog post title.

When Beavers Flew: An Incredible True Story of Rescue and Relocation by Kristen Tracy, illustrated by Luisa Uribe (Random House Studio, 40 pages, grades K-3). In 1948, the town of McCall, Idaho was booming, and the beavers that lived there were becoming a nuisance. Fish and Game warden Elmo Heter thought it would be best for both the beavers and the humans if the animals could be transported to a wilderness area called Chamberlain Basin. The problem was, the basin was surrounded by mountains that were almost impassable. Elmo tried strapping beavers in their traps onto pack horses, but this didn’t work well for the beavers, the horses, or the human riders. His next idea was to attach the beavers to surplus World War II parachutes and drop them into their new home. After experimenting with a variety of boxes, he finally found one that seemed like it would work. When he tried it out with a beaver named Geronimo, the animal landed safely and got out of the box. So Elmo boxed up 75 beavers and dropped them from a plane. When he checked on them a year later, he found that they were thriving, as was the wetland environment they helped create, and the beaver population continues in Chamberlain Basin to this day. Includes an author’s note with additional information, a couple for photos, and a list of sources.

Sometimes I find myself writing a sentence like, “So Elmo boxed up 75 beavers and dropped them from a plane,” and wonder how we got here. But I’m sure kids will find this story fascinating as well as surprising, and Elmo demonstrates some tenacious and creative problem-solving skills. Although the ending is reassuring, dropping beavers out of a plane seems like kind of an ethically gray area, and I’m glad the author’s note discusses the problems that can be associated with moving species out of their natural habitat.

City of Leafcutter ants: A Sustainable Society of Millions by Amy Hevron (Neal Porter Books, 40 pages, ages 4-8). Enter the fascinating world of leafcutter ants, a rainforest community of eight million that produces their own food, uses antibiotics to prevent diseases, manages their trash, and builds and defends their city. Each job is described with a sentence or two of text and collage illustrations that show the different ants at work. There’s a surprising amount of action, including an amazing defense against an invading poison dart frog (don’t worry, everyone’s okay). The back matter provides a lot more information along with a list of additional resources. This is an excellent science book that would be perfect to share with preschool and early elementary kids, although the boys may be bummed by the limited role of the male drones in this largely female society.

A Terrible Place for a Nest by Sara Levine, illustrated by Erika Meza (Roaring Brook Press, 40 pages, ages 4-8). “When Juno and his mom lost their home, they had to move to a new place.” Juno is sure the new place will never feel like home. He and his mom notice he mourning doves that live outside of their new building. When Juno sees two of the birds making a nest on the fence, he tells them it’s a terrible place for a nest. Sure enough, a deliveryman accidentally knocks it down, breaking the eggs inside. Juno tries to rebuild the nest, doing some research to learn more about mourning doves, but the birds stay away. Meanwhile, the illustrations show him making a new friend and settling into his home. By the time a pair of doves settles into the nest, Juno and his friend are ready, with signs warning people to watch out for the nest. “I told them it wasn’t a great place for a nest,” Juno says, “But we made it work.” This sweet picture book will reassure kids who have to move to a new home, with its parallel story about the doves and Juno and his mom. Kids will find plenty to look at in the illustrations, which tell more of Juno’s story than the text does. A little back matter about mourning doves would have been a nice addition.

Clever Crow by Chris Butterworth, illustrated by Olivia Lomenech Gill (Candlewick, 32 pages, ages 4-8). “Wherever you are right now, there’s sure to be a crow or two nearby.” Crows are easy to spot, but also easy to miss. They tend to be plain, not particularly fancy fliers, and have a hoarse caw instead of a melodious song. But they’re smart enough to use tools and store food, and sometimes you can see them acting playfully. To summarize, they are “smart, clever, crafty and playful…just like you!” Includes a list of suggestions for learning more about crows and a short index.

The illustrations in this book are stunning, beginning with the endpapers, which show various crow eggs in the front and the birds that hatch out of them in the back. The text is quirky but interesting, although it left me wanting to know a lot more…for instance, is a crow a specific bird or a family of birds? I was surprised by the inclusion of a blue jay on the back endpapers, since I don’t think of it as a crow, but a quick Google search revealed that it’s part of the crow family. This is an eye-catching introduction, but curious readers will want to dig deeper for more information.

Sleepy: Surprising Ways Animals Snooze by Jennifer Ward, illustrated by Robin Page (Beach Lane Books, 32 pages, grades K-3). Whether it’s the half-sleeping brain of the dolphin, the deep torpor of the hummingbird, or the eyes-wide-open slumber of a snake, animals get their rest in a variety of fascinating ways. Each page features a close-up illustration of the animal with four lines of rhyming text describing its sleep, with a paragraph of additional information giving more details. The last page features a human child experiencing what scientists call “monophasic sleep.” Includes a list of the types of sleep in the book, a list of sources, and pie charts showing sleeping and waking times for all 16 animals and five more showing humans at different developmental stages.

As much as I mourn the loss of Steve Jenkins, his talented wife Robin Page has found an able partner with Jennifer Ward, whose rhyming text and fascinating facts reminded me of many a Jenkins book. The pie charts were very similar to some in his Animals by the Numbers (and the fact that I know that is a testament to how many times I’ve shared that book with classes.) The rhyming text and pictures will appeal to younger readers, and older ones will enjoy the additional information about each animal.