MARVEL'S THE AVENGERS: AGE OF ULTRON PRELUDE TPB (Feb 2015)
Marvel Comics

Avengers: Age of Ultron Prelude will now include AVENGERS #21 (Oct 1999). 

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Product Changes (01/27)

• Marvel’s Avengers TP: Age of Ultron Prelude (DEC140951, $16.99) has revised contents. The book now includes Marvel's The Avengers #1-#2, Avengers: Age of Ultron Prelude - This Sceptre’d Isle Infinite Comic #1, Avengers (1963) #57-#58, Avengers (1998) #21-#22 and Avengers #12.1.The page count remains unchanged.