I would also add the St. Tikhon's Horologion as an acceptable edition. One nice thing about it is that the Lenten variations are given as separate services rather than needing to flip around (one still does, but much less frequently). The print is also sizeable, so it can be read with candlelight from the analogion.

In the portuguese translation there is what is equivalent to "What is holy to the holies" ("O que é santo, aos santos").

Metropolitan/Archbishop Joseph (Raya) of holy memory also published an Epistle Book - unfortunately I don't have a copy. And I seem to remember that someone has done an Epistle Book from the King James Version.

As to Ta Aghia tis Aghiois - in general I share the distaste for applying "thing" to a human being, let alone to Almighty God. But there are exceptions for linguistic reasons. Still, one might say simply "The Holies to the Holy" or something along that line. Or one could keep it in Greek. A few words of Greek can actually be helpful in calling attention to a particular expression.

Fr. Serge