introductory

mastery
UK /ˌɪntɹəˈdʌktəɹi/ US /ˌɪntɹəˈdʌktɚi/adj

card 1 of 10 · synonym

Which word is closest in meaning to 'introductory' in this sentence?

Enrolling in the book club obligates you to buy three more books after the introductory package.