"Sincere" means being genuine, honest, and heartfelt. It refers to expressing true feelings or thoughts without any pretense or deceit. Full definition
Just a note of sincere thanks for all the information, help and guidance you provide. (thebookdesigner.com)
This is not true; and many employers will take this as a lack of sincere interest in the position. (cvtips.com)
* To the best of my knowledge no actual books exist with these titles but if one somehow does, I offer my most sincere apologies in advance. (sewhitebooks.com)