I am a new member here and look forward to interacting and fellowshipping with fellow readers and writers. I would like to recommend a book I wrote called Five Smooth Stones for Prayer Warriors. It takes a look at the prayer in Acts 4:23-31 and finds five principles that underlie the prayer those early Christians prayed during a time of great trial. If you find your mind wandering when you pray (who doesn't?), or if you long to pray with greater depth, you might find the principles discussed in this book helpful. There is a link on my website/blog that will lead you to where you may purchase the paperback or the ebook. If you should do so, thank you, and I pray you will be blessed and encouraged.
www.markdrinnenberg.com