Harald Penrose

• Cloud cuckooland
• Airymouse
• Airymouse (Airlife's Classics)
• An ancient air
• Architect of Wings
• British aviation, widening horizons, 1930-1934
• Cloud Cuckooland (Airlife's Classics)
• No echo in the sky
• Adventure with fate
• An Ancient Air (Airlife's Classics)
• Ancient Air Biography John Stringfellow
• British aviation