Some time ago I did a series of little walking tours in my own city and I enjoyed all the stories the guide told and discovered many things - large and small - that I did not know.
When I saw this book Sydney City Trails from Lonely Planet I was interested to see what aspects of Sydney they included. This book was published in 2017 so it is very up to date.
Things I did not know :
Every ten years they replace the road surface on the Sydney Harbour Bridge
SS Ayrfield is a ship wreck in Homebush bay and it has mangrove trees growing out of it
We have a seed bank in Sydney (Mount Annan) with 10,400 seeds
HMAS Endeavour was sold after Cook's expedition and re-named the Lord Sandwich
Places on the North side of Sydney :
Quarantine Station Manly
Dog day at Scotland Island
Lavender Bay and Wendy's secret garden
Erosion of the beach from Collaroy to Narrabeen
One of the many special places mentioned in this book that you must visit is - Angel Place - forgotten songs
This book is easy to read and it is perfect for both visitors and locals. The only thing I would have liked to see was a detailed city map but I guess you can easily access this yourself from any smart device. You can preview some pages here. There are many other cities in this series - Rome, London, Paris, New York, Washington and Tokyo. I would combine reading this book with Alphabetical Sydney and right now you could also visit The Sydney Museum which is hosting an interactive display based on this book.