For 'Brain Rules (Updated and Expanded)', find the cheapest digital format (eBook or audiobook) and its price. Then, for 'Brain Rules for Baby', confirm if an audiobook is available and, if so, state its total length.
Navigate to brainrules.net. For 'Brain Rules (Updated and Expanded)', find the price of the eBook. For 'Brain Rules (Updated and Expanded)', find the price of the audiobook. Compare the prices to identify the cheapest digital format and its price for 'Brain Rules (Updated and Expanded)'. For 'Brain Rules for Baby', determine if an audiobook is available and, if so, find its length.
State that the cheapest digital format for 'Brain Rules (Updated and Expanded)' is the audiobook. State the price of the 'Brain Rules (Updated and Expanded)' audiobook as $4.99. Confirm that an audiobook is available for 'Brain Rules for Baby'. State the length of the 'Brain Rules for Baby' audiobook as 9 hours and 26 minutes.