*Eligible Accounts: Retail customers in the US (returnable & nonreturnable). No RDCs are eligible.
Minimum quantity: 10 units for the total order. One order per ship-to with a maximum of 10 ship-to locations.
Order Window: 5/1/2025–7/31/2025.
Promo Code Required: EDI Promo Code = RHP007 Reason Code = ED5

May not be combined with any other PRH promotional offer. Accounts must be in good credit standing to participate in this offer. Random House may change terms of sale at any time. Availability subject to change.

Ruth Spiro is the author of the How to Explain Science to a Grown-Up series, the Made by Maxine series, and the best-selling Baby Loves Science series, which has been praised by NPR, Today, Popular Science, the Los Angeles Times, and more. Ruth speaks regularly at STEM and early-childhood conferences across the country. She lives near Chicago, Illinois.