This book I believe is massively undervalued its been under our noses for quite some time , a bit of a sleeper if you like :-). Its the first appearance of the Birds of Prey Team.
Rumour has it that Gotham City Sirens is going to be put on the back burner so Warner Bros can concentrate on a Birds of Prey film.
If thats the case this book is about to get some heat, there's still a few on Ebay for around the £10 mark but already the dealers are putting the prices up.
The Book is of course Back Canary/ Oracle 1