I also didn't know we could recommend general history. I would suggest the Strachan treatment (just called The First World War) of the subject, as well as Martin Gilbert's history with a similar if not identical name, the Tuchman books you mentioned (as well as The Proud Tower, which is sold together with The Guns of August in one volume by the Library of America), and even Jack Beatty's The Lost History of 1914, though that last book was not as rigorous (or well edited) as I would have liked.
ἡ δὲ κἀκ τριῶν τρυπημάτων ἐργαζομένη ἐνεκάλει τῇ φύσει, δυσφορουμένη, ὅτι δὴ μὴ καὶ τοὺς τιτθοὺς αὐτῇ εὐρύτερον ἢ νῦν εἰσι τρυπώη, ὅπως καὶ ἄλλην ἐνταῦθα μίξιν ἐπιτεχνᾶσθαι δυνατὴ εἴη. – Procopius
Ummaka qinnassa nīk!
*MySmiley*