Bluebook Online.

Yes, the Bluebook is now online, with yes, a paid subscription.  A new annual subscription is $25.00. Subsequent annual renewals are
$15.00. Subscriptions of up to three years may be purchased at the
current rate.

Here are the free "Bluebooks" from the military appellate courts.

Air Force.
Army.
Coast-Guard.
Navy-Marine Corps.
Court of Appeals for the Armed Forces.