Unputdownable
Part of speech: adjective
Definition: Impossible to put down
Interesting
Part of speech: adjective
Definition: Arousing or holding the attention or interest of someone.
Part of speech: verb
Definition: To engage the attention of; to awaken interest in; to excite emotion or passion in, in behalf of a person or thing.
Example sentence: There is certainly no absolute standard of beauty. That precisely is what makes its pursuit so interesting.