Salient features of the series are as follows: • Concepts have been highlighted to make them stand out on the printed page. • Tips to write correctly and alerts to avoid common errors have also been highlighted. Both teachers and students will find these tips extremely useful. • There are review sections to evaluate learning outcome. • Exercises are sufficiently large in number and well-graded. There is also a great deal of variety in them, for they include crossword puzzles, word searches, riddles, etc. • Exercises have been designed to generate positivity among students and to inculcate ethical values in them without their being conscious of it.