E. Phillips Oppenheim's 'Berenice'

Well, I'm anything but an expert in antiques. I'm quite the opposite, in fact, quite a newbie. But I bought a selection of old books at a book sale and I did an internet search on each one of them. The other 4 I got I could find the approximate worth fairly easily... But upon searching 'Berenice' by E. Phillips Oppenheim No information showed up, really. It's a 1911 book that's seen better days, but it's still a nice book...

 Is it worthless? Or perhaps is it rare? So, any information you have would help put my mind at rest.

Thank you in advance, and I hope to learn a great deal! :)

-Curious_Bookowner