It gives us immense pleasure to present to you the second edition of Algorithms in Pediatrics. Pediatrics is rapidly advancing with the growth of its subspecialties. At times, it becomes difficult for busy pediatricians, whether in practice, in teaching institutions, or pursuing their postgraduation, to read through lengthy texts of different subspecialties. Keeping this in mind, we thought of bringing forth this concise book on algorithms, which deals with common and practical topics of everyday requirements in different pediatric specialties. The book has been designed with a practical approach in mind, with an algorithm for each topic, along with a concise text to use the algorithms. The text has been kept simple and easily comprehensible. The book can be consulted rapidly in the emergency room, wards, outpatient departments, or busy clinics. The book contains 19 subspecialty sections, a total of 166 chapters. This was an immense work, which could not have been possible without the help and coordination of the section editors. We are very thankful to all the section editors.