It’s Control Systems text book by A. Nagoor Kani (RBA Publications), First Edition for Engineering. I am selling this text book for just Rs. 150. My location is at Ernakulam. Please contact me for more details (Midhun) and WhatsApp: 9,0,3,6,6,6,5,7,5,1 (Nine-Zero-Three-Six-Six-Six-Five-Seven-Five-One).