Because a monolog comes from a great play, it doesn't necessarily follow that it's a great monologue for you.
The writing may be fine and literary, but, from an actor's standpoint, there are other considerations.
A great monologue for you is one that showcases you, lends itself best to your interpretation, makes auditors, instructors and casting directors sit up and say, 'Wow!' Every consideration has been taken to make Dramaline books easy on the actor, to make them readily usable, effective tools.
The accent is on you.