The SciAstra IISER Aptitude Test (IAT) 2026 Mock Test Book is a complete preparation guide for students aiming to crack the IISER Aptitude Test with confidence. This book includes 20+ full-length mock tests, previous year questions from 2022 to 2025, and chapterwise practice questions covering Physics, Chemistry, Mathematics, and Biology.Each mock test is designed according to the latest IAT exam pattern, helping students understand question trends, improve time management, and evaluate their performance. The inclusion of QR codes allows instant access to detailed video solutions, concept explanations, and revision notes, making learning more effective and interactive.Whether you are revising concepts or testing your exam readiness, this book serves as an all-in-one resource for IISER IAT 2026 preparation.