Based on the Marvel Previews #24, July for September 2014, I'd say you need to pre-order the following books in order to keep up with Spider-Man.
Core Titles
Amazing Spider-Man #1.5
Amazing Spider-Man #1.5, variant sketch cover Alex Ross
Amazing Spider-Man #6
Edge Of Spider-verse #1
Edge Of Spider-verse #1, variant cover Greg Land
Edge Of Spider-verse #2
Edge Of Spider-verse #2, variant cover Greg Land
Edge Of Spider-verse #3
Edge Of Spider-verse #3, variant cover Greg Land
Marvel Universe Ultimate Spider-Man #30
Miles Morales: The Ultimate Spider-Man #5
Spider-Man 2099 #3
Spider-Man 2099 #3, variant cover
Superior Foes Of Spider-Man #15
Superior Spider-Man #33
Superior Spider-Man #33, variant cover Mike Del Mundo
Guest Apps
All-New Ultimates #8
All-New X-Men #32
Marvel Super Heroes Secret Wars, HCF 2014 Edition #1
Reprints
All-New Ultimates Vol. 1: Power For Power TPB
Amazing Spider-Man Epic Collection: Great Power TPB
Amazing Spider-Man Vol. 1: The Parker Luck TPB
Deathlok The Demolisher: The Complete Collection TPB
Marvel Universe Ultimate Spider-Man Vol. 7 Digest TPB
Moon Kngiht Epic Collection: Bad Moon Rising TPB
Original Sin Companion HC
Spider-Man Newspaper Strips Vol. 2 TPB