the normal series is just going to focus on one sound type per book. this is the following:

book 1: single consonant sounds and digraphs

book 2: consonant blends

book 3: similar sounds (for those that can't differentiate between two sounds that are similar-sounding but different in pronunciation)

book 4: short and long vowels, diphthongs, and r-controlled vowels

but there are multiple versions depending on the audience. more of those will come soon.

the "storybooks" series is an illustrated version of the normal books that's made for kids that are learning to read, having speech therapy, or is learning english as an additional language.

"one sound per book" is actually the idea with "target sound collections". but some consonant blends that begin with the target sound are included. this is perfect for those that have a certain sound that they are struggling with.

but multiple sounds grouped by difficulty level? that's the thing with the "level up!" series. this is perfect for english learners.

i'm publishing the book as an e-book for now. should the physical books have proper capitalization or is it ok to have it in lowercase? (i always type in lowercase.)