Write a complete 650–800-word practical article titled "How to organise an office book swap". Audience: an office administrator planning a first swap for a small team. Use clear, ordinary English and specific instructions. Start with the useful information; avoid a generic introduction about community, sustainability or the digital age. Include descriptive subheadings and one short preparation checklist. Return only the finished article, not an outline or commentary.

Use this original fictional scenario as the worked example, and identify it as fictional in the article:
- The office has 24 people; actual attendance is not yet known.
- The swap is on Friday 6 November 2026, from 12:30 to 13:15, in the break room.
- People may bring zero to three books. They can attend and choose a book without bringing one.
- Books must be clean, dry and readable. Fiction and nonfiction are welcome. Do not bring magazines or damaged books.
- During the first 35 minutes, each person may choose one book. In the last 10 minutes, people may choose additional remaining books.
- There is no payment, donation or one-book-in/one-book-out requirement.
- Two volunteer hosts will label the tables, welcome people and keep the timing clear.
- Owners should collect their unclaimed books at the end. Donation is only an option if the owner has explicitly agreed; no charity has been selected.
- The organiser will send one invitation and a reminder the day before. Questions go to books@example.com.

Explain how to prepare, invite people, run the swap and deal with unclaimed books. Explain the distinction between allowing up to three books per person and knowing how many books will actually arrive. Do not claim that all 24 people attend, that 72 books are guaranteed, that a specific charity is involved, or that the event has already happened. Do not invent statistics, quotes, sources, links, product recommendations or results. Mark any essential missing fact as [source needed].