Machine design has a very small syllabus and also its basic no extra brain has to be applied on it. During preparation everyone score good marks in machine design just 2-3 readings you will understand everything. By solving last year papers you will get more understanding of concepts. Also there are mostly formulas in machine design which should be there on your tips to solve objective as deriving them may take a lot of time like minimum number of teeth, bearing formulae, sommerfield number, spring stiffness etc. Notes are same as in book so I don’t think there is any difference between them, its not that there is something new written in notes and that is hidden somewhere in book its not like production where, what you find in notes you may not find in a particular book easily. So book is best for machine design.
Do I need to read a book?
For those who are preparing on there own book is quite essential. Since in the notes there are many topics which are not explicitly explained so in order to understand the concept its necessary to have a reference book. Please note that never ever use local author books which students use to pass university semester exams they will never help. Always follow standard textbooks.
Those who are in coaching institutes who don’t get much time to study from a book they may prefer not to but in case of important topics or confusions books are the best refuge.
Which book to refer?
Its always preferred to read book that you have already studied during your BTech. In case you didn’t read any book like most of the engineers.
Following are the books that i would recommend-