Once was enough index

Once was enough I (Latvian Gambit 3.Nxe5 Nc6)
Once was enough II (Portuguese Gambit)
Once was enough III (Czech Benoni)
Once was enough IV (Eingorn Winawer)
Once was enough V (Vienna Variation)
Once was enough VI (Marshall Attack)
Once was enough VII (Chebanenko Slav)
Once was enough VIII (Accelerated Dragon)

Also:

Once was enough - or maybe it wasn't (Berlin Wall)