wager
25× in this editiona bet on an uncertain result
Original-edition reading analysis
Fast-moving in plot, yet the original English translation contains dense travel, nautical, geographical, and nineteenth-century vocabulary. Our recommendation for the complete original is Advanced B2 to C1.
Updated

Short answer
This is the most vocabulary-heavy book in the set. Advanced B2 readers can follow its clear adventure structure with support, but C1 offers a much smoother experience. The specific translation matters: another English translation may use different wording, so these counts apply to Project Gutenberg ebook 103.
Vocabulary profile
The bars show the share of running word tokens—not the share of unique dictionary entries. Common words repeat often, so token coverage is the more useful signal for how frequently a learner may meet unfamiliar language while reading.
These are TeakReader frequency-based vocabulary bands, not official CEFR assignments for every word or an official CEFR certification of the book. They are most useful as comparative reading signals.
Beyond the percentages

Useful words to preview
These manually reviewed words recur in the analyzed edition and are more useful to prepare than one-off names. Counts are case-insensitive and include the exact form shown.
a bet on an uncertain result
a tiered Asian temple tower
a vehicle that travels over snow or ice
a historical four-player card game
a platform where ships load and unload
raised with ropes or equipment
extremely surprised or unable to think
a pile of wood used for ceremonial burning
left a ship or aircraft
favorable or likely to bring success
A practical reading plan
Transparent methodology
We downloaded the UTF-8 plain-text edition from Project Gutenberg ebook 103, removed the standard Gutenberg header and footer, lowercased English word tokens, and matched them against the same ranked frequency data TeakReader uses for vocabulary analysis. We then combined token coverage with editorial review of syntax, narration, dialect, historical context, and wordplay.
Vocabulary coverage is informative but not a complete readability score. Research on reading comprehension commonly distinguishes knowing most running words from understanding every sentence; syntax and background knowledge still matter. See this Cambridge overview of lexical coverage research for context.
FAQ
We recommend Advanced B2 to C1 for the original text. Fast-moving in plot, yet the original English translation contains dense travel, nautical, geographical, and nineteenth-century vocabulary. This is an editorial estimate based on vocabulary coverage and literary features, not an official CEFR rating.
It ranks 22 of 24 in our list of classic books by reading level (1 = easiest): dense travel and nautical words. A reader who knows the B1 word bands knows about 93.47% of the words in the original text, and 95.28% at B2.
This is the most vocabulary-heavy book in the set. Advanced B2 readers can follow its clear adventure structure with support, but C1 offers a much smoother experience. The specific translation matters: another English translation may use different wording, so these counts apply to Project Gutenberg ebook 103.
A2 and B1 classroom editions are shortened and rewritten. They may be excellent learning material, but their advertised levels do not apply to the original English translation analyzed here.
We analyzed the Project Gutenberg plain-text edition (103) against TeakReader’s English frequency list. The analysis found 62,169 word tokens and 6,756 unique forms after removing Gutenberg’s header and footer. Proper names, dialect spellings, inflections, and tokenization can affect the result.
Yes. The edition analyzed here is available free from Project Gutenberg. TeakReader can search Project Gutenberg books and add them to a vocabulary-focused reading library. Availability can vary by country because copyright terms differ.