The email is asking the recipient to write a reply to Helga. What is the subject of the email and what are the main points that the recipient needs to address in their reply?

Analysis of the Email:

• Subject: The email subject is "Detective stories".
• Task: The recipient needs to write a reply email to Helga.
• Reply Requirements:
• The reply should be about 60-70 words long.
• It must answer three questions posed by Helga:
• Does the recipient enjoy reading?
• What is their favourite book?
• Have they tried reading detective stories?
• The reply should follow the rules for formatting an email.
• The recipient should NOT include their address or the date.
• The recipient should thank Helga for the received letter.
• Additional Instructions: Answers to tasks with detailed answers are not automatically checked. Write the answer on paper. On the next page, you will be offered to check them yourself.

Summary: The email is a task prompt for students to practice writing an email reply in English, focusing on content, length, and formatting conventions.