Ghalib

Some of the early editions of Ghalib can't be traced now; ... (p. 22)

Ghalib was a classical poet of India, who lived in the 19th century and wrote in Persian and Urdu. The poet's real name was Mirza Asadullah Baig Khan, while "Ghalib" is the penname he adopted following the tradition of classical Urdu poets. Ghalib is most famous for his ghazals, which he wrote in Urdu, supposedly before the age of 19.

References:

• Mirza Ghalib on Wikipedia

Daadi

'I went to find Daadi,' began Aparna. (p. 10)

Daadi means "grandmother" in Urdu.

References:

• Daadi in Urdu Dictionary
• Daadi in UrduWord.com

The above references differentiate between Urdu and Roman Urdu. I was curious what the difference was. A quick web search revealed that Roman Urdu is the name by which people refer to the Urdu language written in the Roman alphabet. Roman Urdu is commonly used on the internet due to limitations in the technology for using the Urdu script.