The Secret of the Ninth Planet
Read this book freeEvery sentence translated, natural audio, one-tap dictionary
English books for B1 level (intermediate) · Science fiction in English for learners, with translation
A science fiction adventure where a young boy is recruited for a secret mission to the ninth planet, Pluto. He encounters alien civilizations and solves a cosmic mystery. The straightforward plot and simple vocabulary are well-suited for learners.
Learn English with The Secret of the Ninth Planet
- Suits learners around level B1: you read the original, not a simplified retelling.
- Who it suits: a full-length book at B1, for readers who have finished a short classic and want a longer story with the translation as a safety net.
- 5,760 distinct words, each one a tap away from your personal vocabulary list.
- Translation into Russian, Spanish, Brazilian Portuguese, Japanese, Chinese, Turkish or Arabic, aligned to every sentence, shown under the text or beside it.
- Read-aloud audio for every chapter, with the current sentence highlighted as it is read.
- Read in English, glance at the translation under any sentence you are unsure of, and listen to natural read-aloud voices to train your ear.
How it works
- Open the book: no installation, it reads in the browser on any device.
- Read a sentence in English. Its translation sits right under it, so you never lose the thread.
- Tap a word for its meaning and save it; listen to the chapter read aloud.
More about the method →Read your own EPUB with translation →
Create a free accountRead full books, save your progress and vocabulary, upload your own books.
Questions about this book
Can I read The Secret of the Ninth Planet in English for free?
Yes. The first chapters of The Secret of the Ninth Planet open without an account, with the translation, audio and dictionary included. A free account unlocks the rest of the book.
How much English do I need?
The text is estimated at level B1. Because every sentence has its translation underneath, lower levels can follow along too.
Is there audio?
Yes. Each chapter can be read aloud by a natural-sounding voice while the current sentence is highlighted.
Is The Secret of the Ninth Planet available in Russian?
Yes. On Booklern the English text of The Secret of the Ninth Planet is shown with its Russian translation under every sentence, so you read the original and check the Russian whenever you need to.
Is The Secret of the Ninth Planet available in Spanish?
Yes. On Booklern the English text of The Secret of the Ninth Planet is shown with its Spanish translation under every sentence, so you read the original and check the Spanish whenever you need to.
Is The Secret of the Ninth Planet available in Brazilian Portuguese?
Yes. On Booklern the English text of The Secret of the Ninth Planet is shown with its Brazilian Portuguese translation under every sentence, so you read the original and check the Brazilian Portuguese whenever you need to.
Is The Secret of the Ninth Planet available in Japanese?
Yes. On Booklern the English text of The Secret of the Ninth Planet is shown with its Japanese translation under every sentence, so you read the original and check the Japanese whenever you need to.
Is The Secret of the Ninth Planet available in Chinese?
Yes. On Booklern the English text of The Secret of the Ninth Planet is shown with its Chinese translation under every sentence, so you read the original and check the Chinese whenever you need to.
Is The Secret of the Ninth Planet available in Turkish?
Yes. On Booklern the English text of The Secret of the Ninth Planet is shown with its Turkish translation under every sentence, so you read the original and check the Turkish whenever you need to.
Is The Secret of the Ninth Planet available in Arabic?
Yes. On Booklern the English text of The Secret of the Ninth Planet is shown with its Arabic translation under every sentence, so you read the original and check the Arabic whenever you need to.
Can I download The Secret of the Ninth Planet as a PDF or EPUB?
Not from Booklern: the book is read online, in the browser, with nothing to download or install. Your place in the book is saved to your account.
