The sign of four book cover

The sign of four by Arthur Conan Doyle Summary

The sign of four
Arthur Conan Doyle
3.89 (173483 Reviews)
概要
主なポイント
著者
よくある質問

『The sign of four』の概要

In Conan Doyle's "The Sign of Four," Holmes tackles a cryptic treasure mystery while battling cocaine addiction. This 1890 classic cemented the detective's legendary status, despite later criticism for colonial attitudes. What deadly secret connects four conspirators to India's bloody rebellion?

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クイックサマリー8分

著者の声を通じて本を感じる

深堀り42分

知識を魅力的で例が豊富な洞察に変換

フラッシュカード10件の洞察

キーアイデアを瞬時にキャプチャして素早く学習

エンタメ24分

楽しく魅力的な方法で本を楽しむ

『The sign of four』の主要テーマ

deductive reasoningvictorian forensic scienceimperial gothic adventurestolen colonial treasurecriminal psychology

『The sign of four』の名言

How often have I said to you that when you have eliminated the impossible, whatever remains, however improbable, must be the truth?

It has long been an axiom of mine that the little things are infinitely the most important.

Mediocrity knows nothing higher than itself, but talent instantly recognizes genius.

Data! Data! Data! I can’t make bricks without clay.

When you follow two separate chains of thought, Watson, you will find some point of intersection which should approximate the truth.

『The sign of four』の登場人物

Sherlock HolmesBrilliant consulting detective and master of logic
Dr. WatsonMedical professional and Holmes's loyal friend
Mary MorstanYoung woman seeking help with a family mystery
Jonathan SmallOne of the four names on a cryptic document
Major SholtoAn acquaintance of Mary Morstan's father
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『The sign of four』は単なる本ではありません—Societyのマスタークラスです。あなたに最適な方法でレッスンを吸収できるよう、5つのユニークな学習モードを用意しています。深く考える人も、素早く学ぶ人も、物語が好きな人も、あなたのスタイルに合ったモードがあります。

クイックサマリーモード - 『The sign of four』の要約を8分で読む・聴く

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『The sign of four』を8分で要約

『The sign of four』の核心的なアイデアを分かりやすいポイントに分解し、革新的なチームがどのように創造、協力、成長するかを理解します。

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フラッシュカードモード - 『The sign of four』から厳選した10の洞察

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『The sign of four』から厳選した10の洞察

『The sign of four』を素早い記憶のヒントに凝縮し、率直さ、チームワーク、創造的な回復力の主要原則を強調します。

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エンタメモード - 『The sign of four』のレッスンを24分のストーリーで

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『The sign of four』のレッスンを24分のストーリーで

鮮やかなストーリーテリングを通じて『The sign of four』を体験し、イノベーションのレッスンを記憶に残り、応用できる瞬間に変えます。

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"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA
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likes
117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw
platform
star
star
star
star
star

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum
platform
comments
12
likes
108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC
platform
comments
254
likes
17

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore
platform
star
star
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star
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"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful
platform
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96
likes
4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP
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"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon
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201
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16

"It is great for me to learn something from the book without reading it."

@OojasSalunke
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"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn
platform
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37
likes
483

"Makes me feel smarter every time before going to work"

@Cashflowbubu
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star
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"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn
platform
star
star
star
star
star

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA
platform
comments
12
likes
117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw
platform
star
star
star
star
star

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum
platform
comments
12
likes
108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC
platform
comments
254
likes
17

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore
platform
star
star
star
star
star

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful
platform
comments
96
likes
4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP
platform
star
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star
star

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon
platform
comments
201
thumbsUp
16

"It is great for me to learn something from the book without reading it."

@OojasSalunke
platform
star
star
star
star
star

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn
platform
comments
37
likes
483

"Makes me feel smarter every time before going to work"

@Cashflowbubu
platform
star
star
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1.5K Ratings4.7
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