Highly recommend this one if you need a quick booster:
https://archive.org/details/must-you-respond-poorly-to-bad-behavior-bad-communication-in-a-relationship
If you only have a few minutes, though, https://archive.org/details/empathy-meditation-and-how-to-do-feelings-for-couples
If you know someone who would benefit from listening, please feel free to share.
https://archive.org/details/empathy-compassion-forgiveness-gratitude-and-criticism-for-couples
https://archive.org/details/dfficult-emotions-gratitude-im-right-youre-wrong-you-do-it-too-taking-responsibility
https://archive.org/details/interrupting-hard-to-listen-talker-good-listening-couples
https://archive.org/details/prepare-for-the-negative-and-the-argument-so-that-you-are-ready-emotionally-cont
https://archive.org/details/communication-traps-direct-and-indirect-couples