Here are some of the posts in the series,
“A Season of Prevailing Prayer”
With a Full Heart
Prayerless Adultery
What If The Lord Told You Not to Pray?
The Tears of a Tender Heart
A Fountain of Faithful Prayer
Praying in Times of Terror (audio) 
My Cry to the Lord (audio)
God’s Answer May Be Different
Holding the Ropes
The Greatest Escape
All My Fears
The Power of Corporate Prayer
Don’t Quit