Just the other day, I finished reading Ken Gerhard's 2007 book Big Bird! Modern Sightings of Flying Monsters.
The book was published by CFZ(Centre for Fortean Zoology) Press and has a forward by Jonathan Downes, author of The Owlman and Others.
Ken's book covers sightings of apparent live pterosaurs in the United States, Africa, and other places in the world. The two longer chapters are about the "Big Bird" sighted in Texas in 1976. Other flying beasts discussed include thunderbirds, the kongamato, and the ropen.
Ken is also the author of Monsters of Texas(2010, with Nick Redfern) and Encounters with Flying Humanoids.
I have read Big Bird! and Flying Humanoids, and they are both really good reads.