Mention the name of one of his great books...?

Question

Al-Bairouni is one of the greates writers in socieology and has been considered by most of the orientalists, if not all of them, as one of the most unbiased writers.

Answer 1

Abu Rayhan Muhammad ibn Ahmad al-Biruni Persian: ابوریحان بیرونی‎ , September 15, 973–December 13, 1048) was a Persian mathematician, physicist, scholar, encyclopedist, philosopher, astronomer, astrologer, traveller, historian, pharmacist, and teacher, who contributed greatly to the fields of mathematics, philosophy, medicine, and science. Al-Biruni crater, on the Moon, is named after him. He was the first muslim scholar to study India and Brahminical tradition.

He was born in Khwarazm (formerly north-eastern part of the Persian Samanid dynasty) presently in Khiva, Uzbekistan. He studied mathematics and astronomy under Abu Nasr Mansur.

He was a colleague of the fellow Persian Muslim philosopher and physician Ibn Sina, the historian, philosopher and ethicist Ibn Miskawayh, in a university and science center established by prince Abu al-Abbas Ma'mun Khawarazmshah. He also travelled to South Asia with Mahmud of Ghazni who also became his patron, and accompanied him on his campaigns in India (in 1030), learning Indian languages, and studying the religion and philosophy of its people. There, he also wrote his Ta'rikh al-Hind ("Chronicles of India"). Biruni knew the Greek language, the Sanskrit language and possibly Syriac and Berber. He wrote his books in Persian and Arabic, but his native language was Khwarezmian.

Achievements
Some of his notable achievements included:

At the age of seventeen, he calculated the latitude of Kath, Khwarazm, using the maximum altitude of the sun.
By the age of twenty-two, he had written several short works, including a study of map projections, "Cartography", which included a methodology for projecting a hemisphere on a plane.
By the age of twenty-seven, he had written a book called "Chronology" which referred to other work he had completed (now lost) that included one book about the astrolabe, one about the decimal system, four about astrology, and two about history.

He attempted to refine the calculations of Eratosthenes using his methods, but his calculations were off by approximately 400 miles.

Works
An illustration of a lunar eclipse by Biruni.Biruni's works number more than 120. His contributions to mathematics include:

theoretical and practical arithmetic
summation of series
combinatorial analysis
the rule of three
irrational numbers
ratio theory
algebraic definitions
method of solving algebraic equations
geometry
Archimedes' theorems
non-mathematical works include:

Critical study of what India says, whether accepted by reason or refused (Arabic تحقيق ما للهند من مقولة معقولة في العقل أم مرذولة) - a compendium of India's religion and philosophy
The Remaining Signs of Past Centuries (Arabic الآثار الباقية عن القرون الخالية) - a comparative study of calendars of different cultures and civilizations, interlaced with mathematical, astronomical, and historical information.
The Mas'udi Canon (Persian قانون مسعودي) - a book about Astronomy, Geography and Engineering, named after Mas'ud, son of Mahmud of Ghazni, to whom he dedicated
Understanding Astrology (Arabic التفهيم لصناعة التنجيم) - a question and answer style book about mathematics and astronomy, in Arabic and Persian
Pharmacy - about drugs and medicines
Gems (Arabic الجماهر في معرفة الجواهر) about geology, minerals, and gems, dedicated to Mawdud son of Mas'ud
Astrolabe
A historical summary book
History of Mahmud of Ghazni and his father
History of Khawarazm

Answer 2

Major surviving works: -
[1] "India" تحقيق ما للهند من مقولة معقولة في العقل أم مرذولة
[2] "Gems" الجماهر في معرفة الجواهر

Other known works: -
[3] Chronology of ancient nations -- Description of Arabic, Persian, Hebrew, Greek, and various other calendrical systems then in use.

[4] Key to astronomy -- Major lost treatise.

[5] Introduction to elements of the art of astrology -- Popular work on basic math and astronomy.

[6] A book of location of chords in the circle -- Original mathematical methods and proofs.

[7] The Masudi canon -- Lengthy work on math and geography, triangulation method for determining longitude, trisecting angles, doubling a cube, etc.