Summary Answer:

The speaker recommends several books throughout the podcast. Here are the key recommendations with corresponding timestamps:

1. "How to Talk So Kids Will Listen and Listen So Kids Will Talk":
- Recommended as one of the best books on product management and communication with children. The speaker discovered it through his sister, a speech therapist, and found it very impactful, particularly for its approach to negotiation, similar to "Never Split the Difference" by Chris Voss 01:19:23 to 01:19:54.

2. "Never Split the Difference" by Chris Voss:
- Mentioned positively for its negotiation techniques developed by senior FBI agents, which the speaker relates to the communication strategies found in "How to Talk So Kids Will Listen and Listen So Kids Will Talk" 01:19:45 to 01:19:59.

3. "Nonviolent Communication":
- While not the primary recommendation, it is acknowledged as an excellent resource alongside "Never Split the Difference" 01:20:48 to 01:20:52.

4. "Listen":
- Recommended for new parents. It's an orange book about the power of listening to help children navigate challenges. This recommendation came from Joe Hudson, a recent podcast guest 01:21:01 to 01:21:29.

These books are highlighted for their practical applications in communication, negotiation, and parenting.