Will you be getting “Gunshoe for Two” and “Gumshoe on the Loose” by Rob Leininger?
You can suggest these purchases here. (You will first be prompted to log in with your library card number.) Usually the library does try to purchase subsequent titles of a popular series, subject to budget and availability, but it's always a good idea to make your wishes known! In addition, you will receive an update from the collection team as to whether or not they will purchase those titles, and if not, why.
I hope this helps!