Sentence 1: I bought a special book for my sister's 40th birthday present. 
 Sentence 3: I carefully wrapped it and placed it in a safe place 
 Sentence 4:  The day of her party I went to get the book and it was gone 
 Sentence 5:  I searched the entire house and it was and is still missing 
 Option 1: It was a joke book about being a mother. 
 Option 2: It was autographed by her favorite author.