The brief
Write three welcome subject-line concepts for an imaginary personal reading-list tool. The three headings should introduce a first action, suggest how the tool organises a next read and give a returning reader a reason to reopen the list. This study covers subject lines only.
Design decisions
Start with one book makes the first action small and concrete. Your next read has a place introduces the organisational idea without listing features. Pick up where you left the list gives the returning reader a familiar point of continuity. The numbered labels distinguish those three roles. Only the subject lines are shown; no email body copy, links or sending behaviour is demonstrated.
Taking the idea further
These subject lines are original concepts, not an active email campaign or three completed welcome emails. A real assignment would develop and approve the bodies and next steps against the actual product experience. Delivery, consent, unsubscribe handling, triggers and testing responsibilities would need their own confirmed scope.