Which Novel Should I Focus On?

I posted the following on My Facebook Page the other day, and I've received some interesting feedback. I'd love to hear your opinion! Please head over to my page and share your thoughts.

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I'm working on several different books right now. Which one should I knuckle down on and finish first?

1. Isabella the Invisible and the Sumerian Sorceress - book one in a brand new YA series.

2. The Order of Light - Book Five in my Jack Mac Paidin series (new cover design to come).

3. Dark Awakening in the Demon Realm - Book One in my new Demon Realm Jack Mac Paidin Universe spin-off series.

4. Angel Touched - a Jack Mac Paidin Universe novella.

Read summary descriptions of each book at my online shop for more details.