Currently I am reading A Field Guide to God: A Seeker's Manual by Patty Kirk.  I was intrigued because of this review:

'Kirk earned applause (and a PW starred review) for Confessions of an Amateur Believer, an honest account of what it means to develop an intimate relationship with God in a culture that, like the doubting apostle Thomas, wants to 'see' before believing. Her new work takes readers on a guided tour, so to speak, of God's markers along life's pathways, teaching readers to recognize them. Above all else, the author is a thinker, and Christian readers, as well as others, will appreciate Kirk's concern to make certain her facts are solid before presenting any theological statements. Especially effective is Kirk's section on inattention, or as she terms it, 'the skill we lose as we age.' Kirk blames maturation as part of the problem for most adults. Unlike children, who notice everything, adults only pay attention to what pertains to them at that particular moment, thus missing much of what is really happening. Wonderfully written and intellectually vigorous, the book offers a picture of Kirk as she wrestles with her faith in ways that make God manifest in the world for others.' --Publishers Weekly