Lot of 12 board books (includes one set of 8 and another set of 4) In My First Science Library for Babies by Chris Ferrie: * Electromagnetism for Babies * General Relativity for Babies * Newtonian Physics for Babies * Optical Physics for Babies * Quantum Information for Babies * Quantum Physics for Babies * Rocket Science for Babies * Statistical Physics for Babies In Baby Loves Science set by Ruth Spiro: *Baby Loves Coding *Baby Loves Quantum Physics *Baby Loves Thermodynamics *Baby Loves Aerospace Engineering Condition of My First Science Library is excellent (9 out of 10) Condition of Baby Loved Science set is great (8 out of 10) Both book series are rated very high. Please ask questions before purchase, not after.