Book 2 is (terrible)..........................than book 1.
Book 2 is more terrible than book 1.
Book 3 is (exciting)..........................than book 2.
Book 3 is more exciting than book 2.
Book 1 is (famous)..........................than book 2.
Book 1 is more famous than book 2.
Book 1 is the (exciting)..........................book.
Book 1 is the most exciting book.
Book 1 is (exciting)..........................than book 2.
Book 1 is more exciting than book 2.
Book 2 is (boring)..........................than book 1.
Book 2 is more boring than book 1.
Book 2 is the (difficult)..........................book.
Book 1 is the most difficult book.
Book 1 is (exciting)..........................than book 2.
Book 1 is more exciting than book 2.
Book 2 is (difficult)..........................than book 3.
Book 2 is more difficult than book 3.
Book 1 is (difficult)..........................than book 2.
Book 1 is more difficult than book 2.
Book 1 is (exciting)..........................than book 3.
Book 1 is more exciting than book 3.