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CleanMyMac is one of the worst cleaning application out there. It does more harm than any good. It has deleted all the photos that you were used in your Photo book. Don't use that application any more. Delete it.
Re Photos issue, lets rebuild your library and see if it works or not. Hold down Command and Option keys at same time and open Photos. Click Repair.
After Repair check if your able to open the Photos project.
If that didn't work then go to your Pictures folder and move the Photo Library from there to different location. Then restore a most recent library from Time Machine to Pictures folder. Then hold down Option key on your keyboard and open Photos. Select Choose Library and locate and select the restored library. Open it and does it work ?
Please let me know if that didn't work, so we can continue troubleshooting.