Second, "Can You Dig It? and Other Poems" Unearthed by Robert Weinstock. This is a darling (although dark) poetry book about archeology, dinosaurs, and ancient people. It's a fun read.
Third, "The Giving Tree" by Shel Silverstein. Not sure if this is technically poetry, but a nice find anyway!
Fourth, "Six Great American Poets - Poems by Poe, Dickinson, Whitman, Longfellow, Frost and Millay." There are Six Volumes in this set. I bought this at a thrift store years ago, and have treasured it since. It is a "Dover Thrift Edition," a new book set published specifically for the thrift stores. I think I paid two or three bucks for it.
Fifth is "When We Were Very Young" by A.A. Milne, with decorations by Ernest H. Shepard, coloured by Mark Burgess. This hardcover was published in 1989 by Methuen Children's Books in London. This is a lovely edition to any library.
Lastly, but certainly not least, my favorite of all, "A Child's Garden of Verses" by Robert Louis Stevenson, illustrated by Gyo Fujikawa. This version was published in 2002 by Backpack Books. Can you believe I bought this for $1? It's in perfect condition, although there is no dustcover (not sure if one ever existed). But I was so excited to find this book!
Can't wait to see your thrift poetry finds! Enjoy your day and your current book!