The Book Club Harlot's Bed in Purple. The Book Club Harlot's Bed in Purple. Acetate frames. Anti-glare and blue light filtering lense. Includes canvas pouch. 51-21-143 in mm. Imported. TBRC-WA5. TBC182310900. The Book Club designs a range of blue-light reading glasses that are creative, curated and crafted in the digital age. Each pair features their 30% blue light filtering lens for all those scroll-rolling, screen-staring, face-timing eyeballs out there. Made in recyclable, BPA-free, lightweight material.