Through DCUM I discovered Dear Dragon, which are good for right after BOB books sets 4 or 5 or so.
Before your kid is comfortable with set 4 or 5, just keep doing BOB books. Do the sight word readers, the animal stories, the rhyming words ones, all those.
FCPL, at least, just got in the
Five Chapter Books sets, and they are awesome. The first one in the first book is about 200 words long and my child who was at the time just done with the first BOB books set was able to read it. There are 5 "chapter" stories per book, a heavy emphasis on decodable words, and it's perfect for kids finishing up BOB books. Plus there are more of them and they go much further into phonics than BOB books.
All About Reading primers are also decodable.