,,At Attention" is a second book in Out of Uniform series by Annabeth Albert. 
 Apollo Floros is a SEAL and a single father to twins. After losing his husband, he closed his heart and resigned himself to lonely life. What he didn't expect was a burning attraction to Dylan - his best friend's younger brother, who's staying with him for a summer. 
 Dylan had a crush on Apollo when he was a teenager. He thought that he knew him back then, but this summer he gets a glimpse into what kind of man Apollo really is - caring father, control freak and he likes this version even more. 
 I enjoyed ,,At Attention" immensely!!! It was engaging, I literally read it in one sitting. 
 It was an emotional ride - I was smiling, laughing and crying. 
 Both characters were easily lovable, although sometimes I wanted to shake Apollo and make him see what was in front of him! But I guess I'll cut him some slack, he was through a lot... As for Dylan, he was such a sweet guy and I loved how he took care of twins and their dad. 
 I can't wait to read rest of books from this series! 
 Highly recommended!