Further Reading — Chapter 6: Sentences That Work
Tier 1 and Tier 2 sources only — landmark works and widely attributed ideas. No invented citations. Start with Williams if you read only one.
On style at the sentence level
Joseph M. Williams, Style: Lessons in Clarity and Grace (also published as Style: Toward Clarity and Grace). (Tier 1.) The single best book on the sentence. Williams's core idea — that readers expect the subject of a sentence to name the main character and the verb to name the key action — is the engine behind this chapter's treatment of agreement, parallelism, and the orphan this. His chapters on cohesion and emphasis explain why the fixes here work, not just that they do. If this chapter sharpened your eye, Williams will deepen it. Read the chapters on "Actions," "Cohesion," and "Concision" first.
William Strunk Jr. & E. B. White, The Elements of Style. (Tier 1.) The famous short book. Its strength is the sentence-level rules: "Use the active voice," "Omit needless words," "Make the paragraph the unit of composition." Treat it as a checklist, not scripture — some of its prohibitions are the very superstitions §6.10 warns against (it overstates the case against the passive). But Rule 17, "Omit needless words," is the truest sentence ever written about writing, and the worked examples of tightening are still excellent models. Use it alongside Williams, who supplies the why that Strunk & White mostly assert.
On usage, grammar, and the rules worth keeping
Bryan A. Garner, Garner's Modern English Usage. (Tier 1.) The authoritative modern reference for the questions this chapter raises and can't fully resolve: data is vs. data are, which "rules" are real versus superstition, comma and semicolon conventions, which vs. that, correlative-pair parallelism. Garner's Language-Change Index is especially useful — it tells you how accepted a usage currently is, so you can distinguish a genuine error from a contested convention (exactly the §6.5 and §6.10 distinction). The book to keep on your desk and consult by entry, not read cover to cover.
On the cognitive "why" behind clear sentences
Steven Pinker, The Sense of Style: The Thinking Person's Guide to Writing in the 21st Century. (Tier 2 for the cognitive claims; the book itself is real and widely read.) Pinker explains the sentence-level failures in this chapter through the lens of how the mind parses language — why a misplaced modifier or a long subject–verb gap strains the reader, and why the curse of knowledge (the same idea from Chapter 2) is the root cause of so much unclear prose. His treatment of why "classic style" puts the reader and writer on equal footing is a good complement to the why-does-this-work boxes in this chapter. Approachable and modern; a bridge between grammar reference and cognitive science.
How to use these together. Williams teaches the principles that make sentences strong; Strunk & White gives the quick rules; Garner settles the disputes; Pinker explains the cognition underneath. For this chapter's purpose — catching and fixing the 20 errors — Williams and Garner are the two you'll reach for most. Everything in §6.9 has a deeper treatment in one of these four.