Possible Clues:

• Exciting book, 'The Musician's Aide'
• It may keep you awake at night
• Summon artist to produce compelling work
• Book someone to assist pianist
• Pianist's assistant has exciting work
• Book someone to help accompanist
• Internal call for fancy carpenter- it can be novel and exciting!
• Compelling work, original in Prado, by mature English painter
• Assistant to pianist? That's exciting work
• Urge parent to order thrilling book