Answer

Agar aap “Navkar Mantrani Anupurvi ane Ananupurvi” granth ki baat kar rahe hain, to iske author Ramanlal C. Shah hain. Is vishay ki pichhli Jain rachnaon meṁ Acharya Shri Jinkirtisuri ka varnan bhi milta hai. ( jainqq.org)

Explanation

“Ananupurvi Jap” naam se alag aur ek nischit prachin granth ka sandarbh mujhe nahin mila, lekin Navkar Mantra ki anupurvi/ananupurvi par jo prasiddh likhat milti hai, uska modern article Ramanlal C. Shah ka hai. Uske andar jo vishay-vastu hai, uska sambandh Jinkirtisuri se bataya gaya hai. ( jainqq.org)

Takeaway

Agar aap chahen, to main “Anupurvi” aur “Ananupurvi” ka Jain arth bhi bahut saral bhasha meṁ samjha sakta hoon.