Studying botany by the help of textbooks is perhaps the best way to ace this area of study. Botany usually requires students to make a detailed study of various textbooks and reference textbooks. In general, the more one studies, the better off he/she is in this subject.
The raven biology of plants written by Ray F. Evert is one of the most popular books for Botany. This book is good both as a reference book and as a text book to some extent. Apart from that, B.P Panday and G.L Chopra are both wonderful Indian authors that write really comprehensive books.