Rudyard Kipling · 1894
About one unknown word every twelve at a 5,000-word vocabulary. Readable, but it wants support — and that band is also where readers most easily fall into flow.
Coverage = the share of words in the text you already know. The research gives two lines: 98% before independent fluent reading is realistic, 95% for the instructional level that needs support (Hu & Nation, 2000). Proper nouns are not counted as unknown — recognising that it is a name is enough; this book has 359 of them.
Comfortable from about 8,000 words, or read it with glosses. 50,885 words in total; at 150 words a minute for a non-native reader, about 5 h 39 min to finish. Average sentence length 16 words. Reaching 95% coverage on this book (the floor for readability) takes roughly 10,500 word families.
The opening of The Jungle Book, word for word. Tap any word you don't know and its meaning here appears beside it — no sign-up, tap as often as you like.
It was seven o’clock of a very warm evening in the Seeonee hills when Father Wolf woke up from his day’s rest, scratched himself, yawned, and spread out his paws one after the other to get rid of the sleepy feeling in their tips. Mother Wolf lay with her big gray nose dropped across her four tumbling, squealing cubs, and the moon shone into the mouth of the cave where they all lived. “Augrh!” said Father Wolf. “It is time to hunt again.” He was going to spring down hill when a little shadow with a bushy tail crossed the threshold and whined: “Good luck go with you, O Chief of the Wolves. And good luck and strong white teeth go with noble children that they may never forget the hungry in this world.”
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These are already built, and closest in difficulty to The Jungle Book.
Ordered by unknown words per 100. Lower reads easier; to step up a level, pick a higher number.
Computed by Readii from the public-domain text (updated 2026-10-21), not estimated by hand. The Readii reading level is our own scale, anchored on unknown-word density; it is not the same system as Lexile or AR and does not convert directly. Unknown words are counted against a frequency list built from a large subtitle corpus, so the bands mean the same thing for any learner of English, whatever your first language. This is difficulty for a non-native reader, not a native-child reading level.