Myself, Aaron and Josh are currently, taking the Old Testament Challenge

It's a great book, and goes through the OT in 40 weeks! So far we are in week 1, but week 2 starts today!

You can pick it up from Koorong

The other great book i'm currently reading is When I Don't Desire God: How to Fight for Joy by John Piper.

This book goes through some great theology and practical applications of how to make the Word of God the centre of your life, and how to use it as the key to everlasting joy.

You can also get that at Koorong