It's not yet available as an eBook (though it should be!), but nevertheless, we think Phaidon's A Taxonomy of Office Chairs by Jonathan Olivares might be a perfect recommendation for the Unplggd reader who cares about both form and function. Three years in the making, with 180 chairs listed and over 4,000 researched to create this tome dedicated to the most humblest, but ergonomically necessary, of furnishings: the office task chair. It's a technical guide, but one that offers insight of the amount of work and engineering that goes into something we all use on a daily basis. Read this before the next time you shop and invest in an office chair!