# Welcome to Logica Playground!
# Go ahead and edit this program. Start with editing book names and prices.
# You can write new predicates, specify which predicate you want to
# run in the input box below.
Book("From Caves to Stars", 120);
Book("Morning of Juliet", 40);
Book("Dawn of the Apes", 45);
Book("Tragedy and Discord", 124);
Book("How to Get Rich Writing Books for $5", 5);
Book("I Wrote a Book for $5, Guess What Happened Next!", 4);
Book("Breakfast at Paris", 30);
Book("My Friend: Dragon", 102);

ExpensiveBook(book_name) :-
  Book(book_name, price),
  price > 100;