Many standard books referred by selected candidates are in Marathi. English translation of these books is not available . If u want to prepare for the exam in English, I will suggest following thing.
Select English books for concepts n base reading but for the facts and data u have to refer Marathi books.
I will suggest following books
For language papers
Marathi grammar – MO.Ra.walimbe
English – Pal and Suri
Modern India- spectrum
Post independence- ncert and bipin Chandra( syllabus points)
Maharashtra history – 11 th state board history old book . Available in English .
If u will feel it won’t cover entire Maharashtra history syllabus then read gathal or karate ( Marathi medium)
Physical geography- ११ th NCERT and G.c Leong ,it covers concept thoroughly
Maharashtra geography – savadi or deepsthbh ( do Maharashtra related mapping and collect facts from these books). Thear are available in marathi medium
Environment geography- Shankar IAS
Remote sensing – ncert English and internet
C ) Agriculture
State board available in English.
Arun katyayan or Reddy ( English)
Laxmikant polity, governance by laxmikant
refer internet for Laws( read bare acts and make notes) , other topics .
Read from kolambe /IP singh – both in Marathi
Refer internet ,read data from ministry and institute’s website compile it.
Datt sundaram or Sriram or Ramesh Singh
For facts and relevant data – scan it from kolambe or desale( Marathi)
B) Science and tech
WIzard or TMH and Internet
For those opting for English medium for preparation, needs to take some extra efforts and compile the notes from different sources. Use Marathi must read books for data and facts collection . All the best
( परिविक्षाधीन उपजिल्हाधिकारी )