Here’s the perfect thank-you for that overachieving reader in the office: the LightWedge, a lighted acrylic lens that lies flat on the page of a book — no awkward clamps to negotiate. It’s thin enough to double as a bookmark, and the two brightness levels ensure that you won’t disturb a seatmate (or bed partner). $34.95 from Levenger (www.levenger.com) or Barnes & Noble.