Puranas are embodiment of Sri Hari

According to Suta, all the Puranas are nothing but the mediums through which Sri Hari manifests himself

1. Brahma Purana is said to be the forhead of Sri Hari, 
2. Padma Purana is said to be the 'heart' of Sri Hari, 
3. Vishnu Purana is said to be the 'right arm' of Sri Hari. 
4. Shiva Purana is said to be the 'left arm' of Sri Hari. 
5. Srimad Bhagawat is said to be his 'thigh', 
6. Narada Purana is said to be his  'navel',  
7. Markendeya  Purana  is  said  to  be  his 'right-foot'.  
8. Agni  Purana  is  said to  be  his  'left foot', 
9. Bhavishya Purana is said to be his 'right-knee', 
10. Brahma Vaivrata Purana is said to be his 'left-knee'.  
11. Linga  Purana  is  said  to  be  his  'right  ankle',  
12. Varaha  Purana  is  said  to  be  his  'left  ankle', 
13. Skanda Purana is said to be the hair on the body of 'Sri Hari'. 
14. Vamana Purana is said to be his 'skin'.  
15. Kurma  Purana  is  said  to  be  his  'back'.  
16. Matsya  Purana  is  said  to  be  his  'stomach'.  
17. Garuda Purana is said to be his 'bone-marrow'. 
18. Brahmanda Purana is said to be his 'bone'.  

All the Puranas being manifestation of different parts of Sri Hari's body are very sacred and capable of bestowing salvation.

Source: Padma Puarana, Swarga Khand, International Gita Society