$10:
Optics - Hecht, 4th ed., Indian edition paperback (isbn 978-81-317-1807-0)
Fiber Optic Test and Measurement - Derickson (isbn 0-13-534-330-5)
Analog CMOS Design from a Modern Perspective - Razavi, international edition paperback (isbn 0--07-118815-0)
Photonic Analog-to-Digital Conversion - Shoop (isbn 3-540-41344-8)
Advanced Engineering Mathematics - Kreyszig
Poor Charlie's Almanac abridged edition - $10
Why Zebras Don't Get Ulcers

$20:
Modern differential geometry of curves and surfaces with Mathematica - Gray et al
Discrete Structures, Logic, and Computability 2nd ed - Hein

Pick up in EV.