I've heard little (aka "baby") robbins is like a high yield version of the big one, with references to page numbers in the big one. I'm not sure yet as I haven't bought either yet. Actually I'm planning on buying the baby robbins on amazon soon, and my school gives me access to an e-copy of big robbins for free through my school library webpage. There's also an "adolescent" robbins out there, which is somewhere between both. I think the little one doesn't have nearly as many pics as the big one, and brs has very few pics at all (the few they have are black and white too) so I think the big one is helpful for the visuals. After all, lots of path is very visual.