This Spanish grammar book contains information about various grammar topics including: 1. Conjugations of ser and estar verbs 2. The difference between ser and estar 3. Verbs like gustar that use indirect objects 4. The use of hace + time + que to indicate how long something has been happening 5. The use of acabar de + infinitive to indicate recently completed actions It also covers reflexive verbs, affirmative and negative tu commands for regular and irregular verbs, reflexive commands, cual vs que, transition words, imperfect verb forms, and trigger words. The book uses examples and explanations to teach Spanish grammar concepts.