Some seek to convey the wonder of endangered animals while others give tips on how to tackle waste or tell tales of inspirational environmental activists.

All are part of what children’s publishers are calling “the Greta Thunberg effect”: a boom in books aimed at empowering young people to save the planet.

The number of new children’s books looking at the climate crisis, global heating and the natural world has more than doubled over the past 12 months, according to data from Nielsen Book Research shared with the Observer. Sales have also doubled.

Whether it’s beautifully illustrated factual books like A Wild Child’s Guide to Endangered Animals, apocalyptic climate catastrophe novels such as Where the River Runs Gold or how-to guides such as Kids Fight Plastic, publishers are targeting a plethora of new fiction and nonfiction titles at young readers inspired by Thunberg, the 16-year-old climate emergency campaigner.

Facebook Twitter Pinterest A Wild Child’s Guide to Endangered Animals, by Millie Marotta. The author hopes it will spark children’s interest in wildlife conservation. Photograph: book jacket

Earth Heroes, which features Thunberg on its cover, is one of them. A collection of stories by travel journalist Lily Dyu about 20 individual inventors and conservationists around the world, including Sir David Attenborough, Yin Yuzhen, Stella McCartney and Thunberg, it was snapped up in June by children’s publishers Nosy Crow.

“I absolutely would say there has been a Greta Thunberg effect,” says Rachel Kellehar, head of nonfiction. “She has galvanised the appetite of young people for change, and that has galvanised our appetite, as publishers, for stories that empower our readers to make those changes.”

Kellehar has sent the collection hurtling through the publishing process at breakneck speed so that it will hit bookshelves in early October, just before Thunberg find outs if she will be awarded the Nobel peace prize: “We’re turning this around in four months, which is really unusual in children’s publishing.”

Greta’s doing this amazing thing, as are lots of other people you’ve never heard of all around the world Rachel Kellehar

The message of the book is: you’re not alone and you can make a difference, she says. “We feel it’s important to get that message out as soon as possible, and that is partly driven by the Greta effect. Whether or not she wins the Nobel peace prize, October will be a key moment to reach out and say Greta’s doing this amazing thing, but also lots of other people you’ve never heard of all around the world are doing amazing things. From young girls in Indonesia who have got plastic bags banned, to an engineer in India who is creating artificial glaciers, this is a book about people who are finding different ways to confront climate change head on, wherever it is affecting them.”

Bloomsbury will publish a similar collection, Fantastically Great Women who Saved the Planet by Kate Pankhurst, in February. It features women throughout history who have dedicated their lives to studying, conserving and protecting planet Earth. Isobel Doster, senior editor in children’s nonfiction, has also noticed a “Thunberg effect” – a “real thirst” for authors who write about environmental role models to whom children can look up and actions they can take to prevent climate change.

“Additionally, there’s been a tonal shift in the natural history books that are coming on to the market, she says. “It’s not enough just to explore the beauty of the natural world – we have a responsibility to tell readers why it’s important to look after it.”

Plastic is also a hot topic for nonfiction picture books: Walker Books recently acquired one by MG Leonard called Tale of a Toothbrush, which follows the journey of a single plastic toothbrush, while Hachette Children’s Group brought out A Planet Full of Plastic by Neal Layton earlier this summer.

In fiction, Matt Haig’s illustrated chapter book Evie and the Animals – about a girl who wants to save the planet – won plaudits from critics for its timely storyline and strong appeal for Thunberg fans when it appeared on shelves in June. Meanwhile, fans of There’s a Rang-Tan in my Bedroom, the moving Greenpeace cartoon that went viral last year, were delighted when it was published last week as a picture book.

Author James Sellick hopes his story – about an orangutan who loses his home and family due to palm oil production and deforestation – will have greater longevity for children in picture-book form, where it can be revisited and given more context from parents. The book also offers tips about actions children can take, such as writing letters to companies that use palm oil.

“I want not only to educate but to inspire a new wave of eco warriors. Kids are the future. Hopefully if they have been educated about environmental issues from a young age they will go on – and go further – than we are right now,” said Sellick.

Designed in a similar way to inspire the next generation of conservationists, naturalists, biologists, zoologists and nature lovers, A Wild Child’s Guide to Endangered Animals will be published later this month. Author and illustrator Millie Marotta says she is hoping the book will tempt young readers to take a lifelong interest in wildlife conservation and show them there are things everyone can do to help, right now.

“We’re losing so many species every year, every month, every day, even. The generation of children who will be reading this book are the ones who are going to be the most impacted, and who will have the biggest impact. They are going to be the people to fix what’s happened and hopefully turn things around.”

Inspiring the next generation...

Kids Fight Plastic

Martin Dorey

Written by a long time anti-plastics campaigner and founder of the Beach Clean Network, it shows children what they can do in their home, on days out and at school to reduce the plastic they use.

A Planet Full of Plastic

Neal Layton

Nonfiction picture book that explains where plastic comes from, why it doesn’t biodegrade and why that’s dangerous for animals and the planet.

Where the River Runs Gold

Sita Brahmachari

An adventure story set in a terrifying caste-divided, dystopian world in which bees have long disappeared and children must labour on farms to pollinate crops.