General Hindi UPPCS Mains-24

This blog has some good insights. 

https://anjalikataria.wordpress.com/2022/09/10/uppcs-%e0%a4%ae%e0%a5%81%e0%a4%96%e0%a5%8d%e0%a4%af-%e0%a4%aa%e0%a4%b0%e0%a5%80%e0%a4%95%e0%a5%8d%e0%a4%b7%e0%a4%be-%e0%a4%95%e0%a5%87-%e0%a4%b2%e0%a4%bf%e0%a4%8f-%e0%a4%b8%e0%a4%be%e0%a4%ae%e0%a4%be/

1. You could get a solved pyq book for Hindi( (Shilpi, youth publication) - their answers can be wrong so be careful. 

2. A decent book for grammer and writing(PN pandey or Hardev Bahari - pick which feels easier to read for you) 

3. May refer to Yt playlist 'Tarkash by Sunil Kumar' for letter writing format. 

From what I've heard they are pretty particular about grammer, spelling etc. And grammer section questions are often repeated. So practicing is key.