I just finished reading a new book out, “1 Small Deed Can Change The World, compilied by Nachman Seltzer”. I felt very inspired by the many true stories of how a simple words or actions can do so much, like save lives. I highly recommend it.
Also, the “Praying with Fire” books by Rav Heshy Kleinman are also excellent and will help improve your tefillah. He also has a new book called “Yearning with Fire”, about yearning for the Yeshua, very appro for our times.