Hey!

Some of the best books for GPAT exam preparation  are:

1.Book - The Pearson Guide to GPAT and Other Entrance Examination in Pharmacy

Publisher - Pearson Education

Author- Akaberi Shah Baser

2.Book - GPAT Cracker

Publisher - Piyush Book Publications

Author- Dr. Sanjar Alam and others

3.Book - GPAT: A Companion

Publisher- Career Publications

Author- Nazma N. Inamdar

4.Book - GPAT: A Companion

Publisher- Career Publications

Author- Nazma N. Inamdar

5.Book - Synopsis for GPAT

Publisher - Dhawan Book Publication

Author - Dr. Surendra H. Bodakhe,Dr. Sanjay Gupta ,Prof. Vijay juyal Dr. Munish Ahuja

For details you can visit this provided link https://www.google.co.in/amp/s/pharmacy.careers360.com/articles/best-books-for-gpat/amp?espv=1

All the best