(I already made the cover that's why there will be no changes through the screenshotted tutorial.)

Go to adjust

Important

Highlight

50-%
Shadow

50+ %

Saturation

15+%

Contrast

20+%

Clarity

20+%

Hue

(Up to you)

Next, go to curve

The one means your making the picture lighter, the yellow I highlighted means you'll be making the photo dark.

The blue will make the photo blue. It will make the red stand out as well.

Then the yellow, would make the photo yellow.

Both color will combine in places you want it.

And that's it!

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