I am really happy that K is progressing well in reading and loving it! I have started her on the Ladybird Level Keyword Readers (Peter and Jane series). She has finished level 1 and will start level 2 tomorrow. As K progresses each day, I can see her confidence level rise and clearly she is happy that she is able to read the whole page/book on her own. However, although K likes to read, her concentration span is very short. On average, she can only sit through 3 to 4 pages at one go. I would let her continue with the readers whenever the opportunity rises e.g. during her daily poo-poo time...hahaha!!! Rule of the thumb: Stop before your child wants to stop. See how applicable Glenn Doman's teachings are?
Apart from the Ladybird readers, we read other books too but of course, these books are filled with vocabularies strange to K. Unlike the readers which she would "snatch" to read on her own, K would patiently wait for me to read each sentence and then repeats after me. If the vocabularies appear again in the book, there is a good chance that she is able to recognise and read them aloud!