import os

# Directory containing the .txt files
directory = '.'

# Name of the output file
output_file = 'merged_content.txt'

# Open the output file in write mode
with open(output_file, 'w', encoding='utf-8') as outfile:
    # Iterate over all files in the directory
    for filename in os.listdir(directory):
        # Check if the file starts with 'content_' and ends with '.txt'
        if filename.startswith('content_') and filename.endswith('.txt'):
            with open(os.path.join(directory, filename), 'r', encoding='utf-8') as infile:
                # Write the content of the file to the output file
                outfile.write(infile.read().replace('*',''))
                outfile.write('\n')  # Add a newline after each file's content

# Convert the merged text file to .mobi format using Calibre's ebook-convert
os.system('ebook-convert merged_content.txt merged_content.mobi')