Best use of books and hammers
The best upgrade to use each book or hammer on — ranked for your own village by time (and resources) saved.
Finishes any building upgrade instantly.
Best uses of your Book of Building
Tip: start the upgrade first, then use a book — you pay the resources but skip the whole wait. Save books for your longest upgrades; never use one on a short timer.
Books vs hammers
A book instantly finishes an upgrade you've started — you still pay its resources — so save books for your longest timers. A hammer completes a whole level for free, so it saves both the time and the resources.
Frequently asked questions
What is the best use of a Book of Heroes?
On your hero's longest upgrade. Start the upgrade, then use the book — ClashProgress ranks every hero level you can start right now by time saved.
Should I use a Book of Building on a wall?
No — walls are instant. Use it on your longest building upgrade, often a Town Hall, Eagle Artillery, Inferno Tower or new Town Hall defense.