who wrote Aanad mad ?

Answer 1

I strongly feel that you are talking about the book Anand Math.Here is what I could gather about it:
Anandamath (Bangla: আনন্দমঠ Anondomôţh) is a famous Bengali novel, written by Bankim Chandra Chattopadhyay and published in 1882. Set in the background of the Sannyasi Rebellion in the late 1700s, it is considered one of the most important novels in the history of Bengali and Indian literature. Its importance is heightened by the fact that it became synonymous with the struggle for Indian independence from the British Empire. The word Anandamatha can be roughly translated as The temple of joy.

The national song of India, Vande Mataram was originally published in this novel.

Answer 2

Here is an alternate suggestion:

The Cure: How a Father Raised $100 Million--And Bucked the Medical Establishment--In a Quest to Save His Children by Geeta Anand

From Booklist
At 15 months old, Megan Crowley was diagnosed with Pompe disease, a rare genetic disorder that was likely to reduce her life span to five years at most. Her five-month-old brother, Patrick, shared the same disease and its crippling progression. Their father, John Crowley, a freshly minted Harvard MBA graduate, was determined to use his brains and connections to find a cure. He started a family foundation to fund research on Pompe disease and eventually headed a biomedical start-up company with a promising approach. Ironically, the more involved he got in efforts to find a cure, the slimmer the prospects were for his own children as hard business decisions and conflict-of-interest questions thwarted his efforts. Blocked from getting his children into clinical trials that could prolong their lives, and watching them grow weaker and weaker, Crowley concedes that he was occasionally tempted to simply steal the precious drugs. But he pressed ahead. Anand, Pulitzer Prize-winning reporter with the Wall Street Journal, delivers a detailed and heart-wrenching account of a father's extraordinary efforts to save his children and find a cure for a debilitating and life-threatening disease. Vanessa Bushhis children needed to stay alive. Pulitzer Prize-winning journalist Geeta Anand's The Cure is a real-life medical thriller powered by a father's love. A heartening "can do" story."

Answer 3

Bankim Chander Chatterjee, a famous poet and novelist. Our national song 'Vande Mataram' is taken from this novel.