Some letters commonly make more than one sound. Exploring hard, soft, long, and short letter-sounds and having that knowledge secure is an important skill for emergent students to master. The Red Rocket Sound Explorers 26-book boxed set introduces the alternative sounds letters can make, along with the unique single-sound some consonant combinations create. This set includes the following titles: Ch ch ck Hard Cc Hard Gg Long Aa Kn kn Long Ee Long Ii Long Oo Long Uu mb ng Ph ph Short Aa Short Ee Short Ii Short Oo Short Uu Sh sh Soft Cc Soft Gg ss tch Th th Wh wh Wr wr.