Christopher Dewdney's 18 Miles and Peter McMahon and Josh Holinaty's kids book The Space Adventurer's Guide are the winners of the 2018 Lane Anderson Awards, which annually celebrate the best Canadian science books.

Each category — one for adults and one for young adults — comes with a $10,000 grand prize.

Dewdney's book explores the ocean of air above us and its various forms. 18 Miles is the Toronto writer's sixth work of nonfiction.

"From the roaring winds of Katrina to the frozen oceans of Snowball Earth, Dewdney entertains as he gives readers a long overdue look at the very air we breathe," said the prize in a press release.

The Toronto writer is also a poet whose books include Radiant Inventory, The Immaculate Perception and Predators of the Adoration: 1972-1982 — all of which were nominated for the Governor General's Literary Award for poetry. His past nonfiction includes Acquainted With The Night and Soul of The World.

The Space Adventurer's Guide is written by McMahon and illustrated by Holinaty for kids aged 8 to 12. It's a travel guide to the "coolest things to see and do in the universe," including what to do while on vacation on the moon, Jupiter and Mars.

"The book begins with an introduction to current advances in space travel (including the current cost of a rocket trip), how astronauts train for a trip to space and a guide to key space lingo that will have kids talking like an astronaut in no time," said the prize in a press release.

McMahon is a science journalist originally from Peterborough, Ont. Holinaty is an illustrator from Toronto who has published eight children's books, including the upcoming title In the Dark written by Lisa Deretesti.