Dr Seuss's Reading Ladder - Boxed SetLearn to read with Dr Seuss's Reading Ladder! Start at the bottom and climb up each rung, soon you'll find Dr Seuss makes reading fun! Let the colours be your guide on the ladder of learning as you move from blue to green to yellow with twenty of Dr Seuss's best known and loved books. 20 Books in a boxed set. Boxset contents: Blue level titles Dr. Seuss's ABC One Fish Two Fish Red Fish Blue Fish Hop on Pop The Foot Book There's a Wocket in My Pocket!