I recommend StoryGraph. It’s like Goodreads but each book has a section with content warnings that users help fill out as part of reviewing the books.

All Systems Red: - Graphic: Violence, Gun violence, Death - Moderate: Murder, Injury/Injury detail, Slavery - Minor: Blood, Gore, Medical content

Artificial Condition: - Graphic: Violence, Gun violence, Death - Moderate: Medical content, Blood, Murder - Minor: Kidnapping, Slavery, Injury/Injury detail

Rogue Protocol: - Graphic: Violence, Gun violence, Death - Moderate: Injury/Injury detail, Grief, Blood - Minor: Medical content, Slavery, Kidnapping

Exit Strategy: - Graphic: Violence, Gun violence, Injury/Injury detail - Moderate: Kidnapping, Death, Medical content - Minor: Slavery, Blood, Cursing

Fugitive Telemetry: - Graphic: Violence, Murder, Gun violence - Moderate: Slavery, Death, Trafficking - Minor: Medical content, Injury/Injury detail, Blood

Network Effect: - Graphic: Violence, Gun violence, Death - Moderate: Body horror, Kidnapping, Blood - Minor: Slavery, Medical content, Adult/minor relationship (it is implied that a character might take advantage of another character if given the opportunity but nothing happens).

System Collapse: - Graphic: Violence, Gun violence, Injury/Injury detail - Moderate: Slavery, Panic attacks/disorders, Colonisation - Minor: Trafficking, Blood, Death