Short answer: Pick one reliable book per subject and go through it three times with different goals: understand, practise, then revise. This usually beats reading three books once.
Why repetition wins
Each new book has its own order, language and examples. Switching books means starting from the beginning each time, and the early chapters get read often while later ones are rarely reached. Repeated passes through one book build real familiarity.
Pass one: understand
Read at a steady pace, focus on concepts and do not worry about remembering everything. Note chapters that felt confusing with a small mark so you can return to them.
Pass two: practise
Go through the book again, but now solve questions, redraw diagrams and test yourself after each section. This pass is faster than the first because the ideas are already familiar.
Pass three: revise
Use your notes and the marked parts of the book to revise quickly. By now you should be able to skim a chapter and recall its main points, going deeper only where something feels weak.
When a second book is justified
Add a second book only when the first has a clear gap, such as too few practice questions. Pick it for that purpose and do not duplicate chapters. Our article on planning study with a limited number of books shows how to decide.
The money side
Owning fewer books means you can buy the best copy of the one you need, new if it has a changing syllabus or second hand if it is stable. You can compare options at new books and second hand books.
A three-pass plan
- Pass one: concepts, no pressure to memorise.
- Pass two: questions and diagrams.
- Pass three: notes and weak areas.
Common mistakes to avoid
Students sometimes think repeated reading means rereading passively. A second pass that is only a slower first pass adds little. Each pass must have its own task, such as solving questions, drawing diagrams or summarising from memory.
Another mistake is choosing the one book badly. Before committing, check that the book covers your syllabus, has reviews or recommendations from your teachers, and matches the current edition. A little time spent on this choice saves months later. If your chosen book is out of print or unavailable new, a used copy of the correct edition is a sensible alternative.
Frequently asked questions
Is one book per subject enough?
It can be, if the book is reliable and covers the syllabus. Add another only to fill a clear gap such as practice questions.
How long should each pass take?
The first pass takes longest. Later passes are quicker because the ideas are already familiar.
What if my one book is weak in a topic?
Use a second source only for that topic rather than switching the entire subject.