Hello,

These are some of the preferred ones to prepare for B.Arch

• Keys to Drawing – Strategies and Exercises for Gaining Confidence and Enhancing your Creative by Dodson
• NATA/JEE B. Arch Study Material Kit Paperback by Silica 
• A complete Self Study Guide for B. Arch  Entrance Examination (English) by P. K. Mishra
• Architecture Question Bank and NATA Sample Papers (sixth edition) by M. L. Malhotra
• Quantitative Aptitude ebook (ALL Parts Solved) by R S Agarwal by R. S.Agarwal
• Verbal & Non Verbal Reasoning by R. S. Agarwal 
• B.Arch. & NATA Entrance Exam Solved 6th Edition solved paper till 2018 S. K.Sharma

Hope this helps...