I've only read the taster for this book so far and I think it's really good, although it's quite easy to read." Whales are social on a scale that is difficult for the human eye to perceive. Whales in southeast Alaska will maintain relationships for decade. They'll get together every year in similar locations to forage together ." How can whales actually sing?

This book is great! I loved the facts about all the different whales, although the book is sad in many parts. I would have also liked there to have been a few more chapters!" I think The Longest Whale Song was really really fab, but it was also a bit sad. The last chapter was really touching and made my eyes water!" I had to go through rigorous testing on all my equipment before they finally accepted the paper for publication,” he says.

He discovered that animals in the wild emit echolocation chirps that are up to 100 times louder than animals in captivity (the only animals that had been studied in detail). The animals vary the volume of their vocal calls, he says, to suit their environment – hence why animals in tanks are much quieter. This finding was so “astonishing” he says that his first research paper was rejected because the animal’s capacities seemed improbable. This book is full of exciting conflicts that you could never imagine. Ella has a lot of personality so you'll like it!" I didn't really think I'd enjoy it, but I got given it for a present and it was a lot better than I expected. The storyline was typical of Jacqueline Wilson and like all her books, there was something unique in it." Our best analogy at the moment is human fashion, where a new look comes about and everyone switches. Or a new pop song comes available and everyone is suddenly listening to it . This book is a bit different to her others, but I still think it's fab. Keep on writing Jacqueline! My friends and I think you're a real inspiration!"

So it is no surprise the military realised they could learn a thing or two from dolphins about how to use sound underwater. Military scientists in four countries – the US, Russia, Iran and the Ukraine – have all worked with dolphins: one, to study how they echolocate in the hopes of designing better submarines and sonar detectors. And, two, to train them to listen for approaching submarines, reveal the location of buried explosive devices underwater, and uncover the identity of suspicious objects. Long before the navy figured out how to harness the acoustic properties of the ocean’s depths to send signals as far as possible, whales developed behavioural strategies to communicate with each other over enormous distances: the call of a fin whale for example may travel 250km at the surface, but more than 6,000km in the deep sound channel. Inadvertently, military research led to biological enlightenment and conservation movements. Dolphins in the militaryI really enjoyed this book even though it's very sad. I marvelled at how she coped without her mum." She has written over 70 best-selling books, and several have even been adapted for TV – most famously The Story of Tracy Beaker. Her signing sessions attract huge crowds of fans and last for hours! Over 25 million copies of her books have now been sold in the UK alone. However, despite these restrictions, scientists have developed a theoretical understanding of how whale noises are formed.

You can see how echolocation would evolve if you’re in a dark environment like a cave or the deep ocean – there are in fact many blind humans who have learned how to echolocate, and even normal sighted people can tell if they are in a huge chamber or a crowded room just by listening to the acoustics,” he says. “But while bats have a typical mammalian ear, cetaceans have a much more specialised system.” Evolving for sound

All humans have been doing for the past 70 years developing sonar detection equipment, really, is learning from cetaceans about how they do what they do, and trying to figure out how to use our own sonar systems in a similar way to what they have been doing for millions of years,” he says. Sound travels faster and further in water For us, we have two eyes, which we use to form three dimensional images. But with their acoustic system, we still don’t know how they receive information from objects at different angles. It could be that they use their ears, or it could be that they use their teeth – we still don’t know.”

I enjoyed the story very much. I like Ella's bunches and red rosy cheeks. Things were bad at first but when Ella started her project she was a lot happier and she was excited because she was going on holiday."

When reading the book, I could feel myself warming towards Ella immediately. I found the story touching and I found myself going on a great journey! I would highly recommend it!" This is a really great book! Ella is about to have a new baby brother when her mum falls into a coma. In class she is learning about whales and how they talk without people being able to hear them. Ella wants to see if a whale song will reach her mom to tell her how much she loves her." I think it was an absolutely brilliant book, but I think that some of the chapters were very similar." As well as winning many awards for her books, including the Children’s Book of the Year, Jacqueline is a former Children’s Laureate, and in 2008 she was appointed a Dame. I am a few chapters in and I already love 'The Longest Whale Song'. It is much more gripping than 'Hetty Feather' and draws you in straight away."