The Schaum Note Speller has the unqualified testimonial of thousands of teachers who pronounce it 'The Best.' Musical facts, beginning with line and space numbers are taught. Students learn by doing, since this book is in workbook form. This saves valuable lesson time, and immediately shows any mistakes in the beginner's thinking.
I’ve used Schaum’s Note Speller series for my young piano students for many years. I like the order in which information is introduced and the format in which it is presented, in contrast with the somewhat chaotic presentation and confusing format of others like the Faber books.
My one issue would be that Schaum waits until the very last page to introduce enharmonics. But it’s still introduced in the first book, so this is a small issue.