Since you mentioned "Pdf Prathmic Book — solid guide," it seems you are looking for a reliable resource to help you prepare for the Prathamic (Elementary) Hindi exam, likely conducted by Dakshina Bharat Hindi Prachar Sabha (DBHPS).
Book Title: Prathmic (Prathama/Part 1) Standard: Equivalent to Grade 3–4 (Beginner Literacy) Language: Hindi (Devanagari script) Pdf Prathmic Book
What is PDF Prathmic Book?
What is a PDF Prathmic Book?