Reference Books in English
Browse 2 reference books in English to learn English with tap-to-translate in the Clue app. Reading in a single genre is one of the fastest ways to expand vocabulary.
2 books in Reference
A Tangled Tale
Lewis Carroll
Intermediate (B1–B2)
Bulfinch’s Mythology
Thomas Bulfinch
Intermediate (B1–B2)Learning English with books — FAQ
Which file formats does Clue support?
EPUB, PDF, and plain text (.txt). Drop them in from iCloud Drive, Files, or any other source.
Can I read books I bought on the Kindle Store?
Not directly — Amazon DRM prevents this. But you can read DRM-free EPUBs from Project Gutenberg, Standard Ebooks, Tor, and many independent publishers.
Does it work offline?
Yes. Once a book is in your library, reading and dictionary lookups all work offline. You only need internet to download new books.
How big is the dictionary?
27,000 English headwords with translations into each supported native language. That covers the vast majority of words you'll meet in modern fiction and journalism.
Is there a Kindle integration?
No. Clue's reader is self-contained. The trade-off is that everything works offline and we control the typography and tap experience end-to-end.