Admittedly, I am a sucker for alphabet books. I have seen some truly great ones over the years: Mitsumasa Anno’s “Anno’s Alphabet’’ and Mary Azarian’s “A Farmer’s Alphabet’’; more recently the stunning “ABC3D’’ by Marion Bataille. Leslie McGuirk’s “If Rocks Could Sing’’ is subtitled, “A Discovered Alphabet,’’ and indeed the book gives new meaning to found objects. McGuirk, who lives near the sea in Florida, has spent years collecting stones that suggest the letters of the alphabet. The result is witty, inspiring, and altogether dazzling. “C is for couch potato’’ - a potato-shaped stone lying on a small chaise lounge, above a rock curved just like the letter. F is for “footprint’’ (one flat rock and five toes); L is a rock that’s a dead ringer for a lemon; R is for a rabbity looking rock, and so on. My two personal favorites are the T for “toast’’ stone - perched on a plate beside a knife and pat of butter - and all the spooky “ghost’’ rocks gathered on one page. Yes, one stone looks like a whale. And on the facing page, clearly a rock inscribed with the letter X. You may never look at rocks quite the same way again - or the alphabet, for that matter.