We need to produce JSON with keys: summary, category, article_html. Must follow article rules: exactly one H1 at start with primary keyword. Primary keyword likely "best books to read this summer 2025" or "best books to read this summer 2025". H1 at start. Then H2 sections 5-7 main sections. Each section: 2-3 p tags, each 100-150 words. Use UL/OL lists, 5-10 items. Use STRONG for key terms. End with 3-5 FAQ as H3. Minimum 1500 words. That's a big article. Must be HTML string. Must be valid JSON. No markdown, no code fences. Ensure JSON string properly escaped. Need to produce a long article. 1500 words approx. Let's craft.
We need to ensure each paragraph 100-150 words. That's 2-3 per section. Let's plan 6 sections (H2). Each with 2 paragraphs. That's 12 paragraphs. Each 100-150 words: 120 words average. Total words: 12*120 = 1440 words. Good.
We need to include book recommendations, authors, key takeaways. Use bullet lists of 5-10 items. Use strong tags for key terms.
Also need to include FAQ as H3 at end. 3-5 questions.
Also category "howto" as given.
Ok.
We must ensure JSON string escapes e.g., double quotes inside HTML must be escaped. But we can use single quotes in HTML? HTML uses double quotes for attributes etc. In JSON string, we need to escape double quotes. We'll produce JSON with double quotes surrounding keys and values. Inside article_html, we need to escape double quotes. Or we can use single quotes for attribute values? In HTML, we can use single quotes for attributes to avoid escaping. Eg . That is fine. We'll avoid double quotes inside article_html to reduce escaping. However, we might need to use double quotes for attribute values like class. We can use single quotes. Good. We'll avoid double quotes inside article_html.
Also we need to ensure that article_html string is valid JSON string: we need to escape newlines? It's fine to have literal line breaks inside JSON string? JSON string can contain literal newline characters if escaped as \n. But easier: produce article_html as a single line string with \n as newline escapes. But we can just produce as string with line breaks? In JSON, line breaks inside string must be escaped. So we need to escape them. That becomes messy. We can produce article_html as one line with \n escapes. That may be heavy.
Alternative: Use single quotes inside HTML to avoid double quotes, but still line breaks. But still need to escape them. Let's produce article_html as a single string with \n escapes manually. That's okay.
However, we can circumvent by using JSON raw string? Not allowed. Must be valid JSON.
We'll produce article_html with \n for newlines and appropriate escaping of backslashes if any. We'll ensure no double quotes inside.
Let's design article.
Outline:
H1: Best Books to Read This Summer 2025
H2 Sections:
1. Fiction: Escape & Adventure
2. Nonfiction: Personal Growth & Learning
3. Mystery & Thriller: Keep You on Edge
4. Science Fiction & Fantasy: Imagine the Future
5. Memoirs & Biographies: Insightful Stories
6. Young Adult & Contemporary: Fresh Perspectives
Within each section, 2 paragraphs. Each paragraph 100-150 words.
Paragraph 1: Intro, set context, mention why this category is good for summer.
Paragraph 2: List of 5-10 books with authors, key takeaways. Use UL list with 5-10 items, each bullet: Title by Author — key takeaway description.
Make each bullet around 30-40 words? That would push paragraph length. But we need 100-150 words per paragraph. If we include UL, the bullet items count as part of paragraph content. We'll need to ensure paragraph length. But we can slightly adjust.
We need 2-3 paragraphs per section. We'll provide 2 paragraphs.
Paragraph 1 ~120 words; Paragraph 2 contains list and maybe a concluding sentence.
Ok.
Now we need to write content.
We must ensure we don't use double quotes inside article_html. Use single quotes for attributes. Use at start. Then
tags for paragraphs. We'll need to escape newlines. We'll produce article_html string with \n for newlines. Let's craft article_html content. We need to include