Dinosaur cove are fairly simple chapter books, some pictures I always find myself recommending alfie books because ds1 loved them and the pictures are just gorgeous I think there is a series called pirate cove as well Usborne have lots of fiction of varying difficulty, try their young readers series 1 for simple chapters and lots of colour pictures
I always recommend the Yakari & the great eagle about native american boy - fab pictures. Mudpuddle farm series for first chapter book - get the 6 in 1 for a bargain. Sea Captain Ned (TV's Koala brothers) good story about making the best of what you've got + colour pics on every page. Dinosaur cove books a big hit here with DS just 7 but there are lots of dino names to stumble over.