A very important article by Ali Sina, author of ‘Understanding Muhammad’ and founder and chief editor of www.faithfreedom.org is ‘A Short biography of Muhammad’. It was written in 2015, and is of only 28 pages in English. This important article was available in Telugu, Tamil, Malayalam, Kannada, and Bangla apart from English. Now it has also been translated and made available in Hindi, and is in only 23 pages.

It can be downloaded in Hindi here https://www.mediafire.com/file/euty0o1guncldkr/A_Short_Biography_of_Muhammad_%2528Hindi%2529_by_Ali_Sina.pdf/file

or here https://www.pdfdrive.com/a-short-biography-of-muhammad-hindi-by-ali-sina-e201368105.html

Hindi is a language which is understood by a very large number of people, at least 600 million in India, Pakistan, Bangladesh and Nepal.

Some other important books and articles available for free download in Hindi are:

1- “Understanding Muhammad” by Ali Sina (239 pages) in Hindi

https://www.mediafire.com/file/nw2zlkul35puvu4/Understanding_Muhammad_in_Hindi_Full_book.pdf/file

2- “Islamic Jihad- A legacy of forced conversions, imperialism and slavery” by M A Khan (440 pages) in Hindi

https://www.mediafire.com/file/g3ytes7ycpavcr5/Islamic_Jihad_-A_Legacy_of_Forced_Conversions%252C_Imperialism_and_Slavery%2528Hindi%2529_by_M_A_Khan.pdf/file

3- “Jihad and Jannat in Hadith” (48 pages) in Hindi

http://www.mediafire.com/file/r43yk6nrhnfgzw0/Jihad_%2526_Jannat_in_Hadith_%2528Hindi%2529.pdf/file

4- “Paradise (Jannat)- A Mirage for Muslims” (12 pages) in Hindi

http://www.mediafire.com/file/6agxasryda8ct40/Paradise_%2528Jannat%2529-A_Mirage_for_Muslims%2528Hindi%2529.pdf/file

5- “Mistakes in the Quran which show Islam as false- Part 1” (11 pages) in Hindi

http://www.mediafire.com/file/4czyocs4lmvuugz/Mistakes_in_the_Quran-1_%2528Hindi%2529.pdf/file

6- “Mistakes in the Quran which show Islam as false- Part 2” (8 pages) in Hindi

https://www.mediafire.com/file/zkb6chfsg7vwha7/Mistakes_in_the_Quran-2%2528Hindi%2529.pdf/file

7- “Roots of terrorism” by Abul Kaseem (200 pages) in Hindi

https://www.mediafire.com/file/ntgcnh17my0izur/Roots_of_terrorism_by_Abul_Kaseem_%2528Hindi%2529.pdf/file

8- “39 ways to do Jihad” (68 pages) in Hindi

https://www.mediafire.com/file/tbwlcix7zmb9e44/39+ways+to+do+Jihad-+Hindi+book.pdf/file

9- “Quran in 2 hours” by Bill Warner (81 pages) in Hindi

https://www.mediafire.com/file/6y744g1x8ppe9t3/Quran+in+2+hours+by+Bill+Warner+in+Hindi.pdf/file

10- “The Quranic concept of War” by Brigadier S Malik of Pakistan (110 pages) in Hindi

https://www.mediafire.com/file/hhnatxnny4bjyo9/Quranic+Concept+of+War-+Brigadier+Malik+of+Pakistan+(Hindi).pdf/file

11- “Rangeela Rasool” (34 pages) in Hindi

https://www.mediafire.com/file/w82wc8u3g43sxaw/Rangeela_Rasool_%2528Hindi%2529.pdf/file

12- “The secret of Muhammad’s success” by Ali Sina (19 pages) in Hindi

https://www.mediafire.com/file/pgabhs2bpjl0sgr/The+Secret+of+Muhammad’s+Success+by+Ali+Sina+(Hindi).pdf/file

13- “How I left Islam- From belief to enlightenment” by Ali Sina (22 pages) in Hindi

https://www.mediafire.com/file/jqe7xermdonx8ay/How_I_left_Islam-From_Belief_to_enlightenment%2528Hindi%2529_by_Ali_Sina.pdf/file

14- “A God who hates” by Wafa Sultan (269 pages) in Hindi

https://www.mediafire.com/file/n69mpyv9m98dxko/A_God_Who_Hates-by_Wafa_Sultan%2528Hindi%2529.pdf/file

Some other important books and articles are available in various languages at this link https://www.faithfreedom.org/important-books-and-articles-e-g-mistakes-in-the-quran-in-various-languages-for-free-download/